Spider 2000 Elec Diag Manual 80 81

8/6/2019 Spider 2000 Elec Diag Manual 80 81

1/62

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.~'SPIDER 2000 ~.. ,."I //

.ELECTRICAL DIAGNOSTIC MANUAL

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CONTENTS

How To Use This Manual............. 1Symbols 2Electrical Troubleshooting ., . . . . . . . . . . 4Fuse Data 6Grounds 8

INDEX

Charge............................... 10

Cigar Lighter 46Clock 46Coolant Temperature Gauge........... 44Cooling Fan................ 19Fuel Gauge. . . . . . . . . . . . . . . . . . . . . . . . . .. 44Fuel Injection. . . . . . . . . . . . . . . . . . . . . . . . . 20Gauges 44Gulp Valve Bypass. . . . . . . . . . . . . . . . . . . . 16Heater............................... 58Horns................................ 53Idle Shut-Off 13Ignition 13KeyWarning 46Lights

-Back Up.......................... 36-Brake Warning 46-Cigar Lighter 40-Courtesy . . . . . . . . . . . . . . . 38-Dash Panel. . . . . . . . . . . . . . . . . . . . . . . 40-Front Marker 32-Front Park. . . . . . . . . . . . . . . . . . . . . . . . 32

Lights (continued)

-Hazard . ". . . . . . . . . . . . . . . . . . . . . . . .. '28'-Headlights. . . . . . . . . . . . . . . . . . . . . . . . 26-Indicators 44-Instrument Cluster................ 44-License 34-Lights-On Indicator 34-Rear Marker. . . . . . . . . . . . . . . . . . . . . . 34-Rear Park (Tail) 34-Stop............................. 36-Tail 34-Trunk 34-Turn 28

Power Antenna. . . . . . . . . . . . . . . . . . . . . . . 54Power Distribution. . . . . . . . . . . . . . . . . . . . 10Power Windows 56Radio................................ 54Remove KeyWarning 46Seatbelt Warning. . .. . . . . . . . . . . . . .. . . . 46Starter....... .. 16Tachometer.......................... 44Warning Indicators. . . . . . . . . . . . . . . . . . . . 44Windshield Wiper/Washer............ 50


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These electrical diagrams have beendesigned to make troubleshooting easier.Components which work together areshown together. For example, all electricalcomponents used in the Starter circuit areshown on one simple diagram. TheIGNITION SWITCHis shown at the top ofthe page. All wires, connectors, splices,switches, and motors are shown in the flowof current to ground at the bottom of thepage. Notes are included which describehow switches and other components work.For example, on the Courtesy Lightsdiagram the DRIVER'S DOOR JAMBSWITCH includes this note: "closed withdoor open." Switches and sensors areusually shown in the "at rest" position, as ifthe engine were warm but the IGNITIONSWITCH were "Off."

The Charge/Power Distribution diagramshows all connections from the BATI'ERYand GENERATOR to the IGNITIONSWITCH, LIGHT SWITCH and fuses. Ifyou combine the Charge/Power Distri-bution diagram with any other circuitdiagram, you will have a complete pictureof how the circuit gets its voltage and how

it works. Ground diagrams show howseveral circuits are connected to commongrounds.

The Circuit Operation description coversunusual features of each circuit. CircuitOperation also explains the flow of elec-tricity through each circuit from voltagesource to ground.

Read Troubleshooting for hints on how tofind the cause of the problem and repair it.Read the "If" statements and find the onewhich describes the problem you are work-ing on.

Component Location charts are includedonthe first page of circuit operation text foreach circuit. Use the Component Locationcharts to find electrical components on thecar. Each component is listed with adescription of where to find it on the car,

and a page/figure reference to a drawing orphoto.

General information is also included: 1)alist of electrical symbols and wiring connec-tions; 2) instruction in Electrical Trouble-shooting; 3)a Fuse Block drawing, and 4)atable giving conversions from metric toAmerican Wire Gage sizes.

Location Heferences

Referencesto LH, RH, front and rear are

made from the driver's seat, lookingforward.

WIRE COLORABBREVIATIONS

(Alphabetical Listing)

BLK BLACKBRN BROWNDK BLU DARK BLUE

GRN GREENGRY GRAYLT BLU LIGHT BLUEORN ORANGEPNK PINKRED REDVIO VIOLETWHT WHITEYEL YELLOW

HOW TO USE THIS MANUAL

METRIC SIZE AWG SIZE

.8 181 1 61. 5 14

2. 5 1 2

4 1 06 8

10 6

3 2 . 0 2

Figure 1 - Wire Size Conversion Table

FIAT SPIDER 1


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SYMBOLS

. 8 B L K IV IO

'7 I'IATSPIDI'R

C O MP ON EN T S HO W N

C OM PL ET E A NOO NL Y O NC E

C O M P O N E N T

S HO W N IN

M O R E T HA NO N E P LA C E

O R P A RT O F

A C O M PO N EN T

N A ME O FC O L O S T A R T ~ C O M P O N E N TVA L V ES U P P L I E SA D D IT IO N A L D E T A IL S A B O U TF U EL F O R ~""'f---_C O M P O N E N TC O L D ST A R T S O R IT S

O P E R AT I O N

C O M P O N E N T

C A SE IS D lR E C n Y

A TT AC HE D T O

M ET A L P A RT O F

C A R (G R O UN D ED )

W IR E IS A TT AC H E D T OM ET A L P A RT O F C A R

( G R O U N D E D )

G RO U ND IS N U MB ER EOF O R R EF E R EN CE O N

G 54 C OM PO N E N T L OC AT IO N C H AR T=

IN CL UD ES O N L Y

E LE CT RO N IC P AR TS

1. t~1

.5 P N K~i~ .B . . ../ F E M A L Ed~~_

~ 1 ~ ' 3.5 P N K.c .~ .1 "~ M A L E

.11. . . .1.* ;1j~

R A D I O

S P E A K E R

.5 G R YC O M P O N E N TC O N N E C T O RAT T A C H E D

T O W IR E (P IG T AIL )

C O N NE C TO R R E FE R EN C EN U M B ER F OR C OM P ON EN T

L O CA T IO N C H A RT ,

C HA R T A LS O S H O W ST O TA L N UM B E R O F

P IN S P O SS IB L E. A L L

C AV IT IE S M A Y N O TB E U SE D. S EE

E X A M PL ES B EL OW

5 C AV I T YC O N N E C T O R(5 O U T O F 5 C A VIT IE SA R E U SE D )

5 C AV I T YC O N N E C T O R(4 O UT O F5

C A VIT IE S A R E U SE D)

. 3 R E D

S IZ E - W IR E S IZ E IS L A B E L E D IN

S ~U A R E M M (M IL LIM E TE R S)

C O LO R - IN SU LA TIO N C O LO R IS

S HO W N A ND L AB EL ED

_ _ _ _ S P L IC E - A S P L IC E S H O W S T H E

C ON NE CT IO N O F T WO

O R M O R E W IR ES

IF N O W IR E S IZ E IS

L AB EL ED R EP LA CE W IT H

M A TC H IN G W IR E S IZ E

R E D

R E D / Y E L

F R O M

C H O K E

H E AT E R

R E L A YP A G E90 0

.5 V E L

v.5 Y EL

T O G E NE R AT O RP AG E 8 00

.8 O K G R N

L I G H T S: T U R N / H A Z A R D IS T O P /

F RO N T P AR K/F RO N T M A RK ER

A B RE A K IN W IR E

IS S H O WN B Y A

W A V Y L IN E

W I R E I NS U L A TI ON

IS O N E C OL OR

W I R E I NS U L A TI O NIS O NE C OL OR

W IT H A N O TH E R

C O LO R S TR IP E(R ED W IT H Y EL LO W )

T W O E N D S O F O N E

W IR E S H OW N IN T WO

D IF FE R EN T P LA C ES .

A RR OW S HO W S P O IN TO F B RE A K A NO

D IR EC TIO N O FC U RR EN T flO W

A W IR E W H IC H

C ON N EC TS T O

A N O T H E R

C I R C U I T


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O N E P O LE ,

T W O P O S IT IO N

SWITCH

.8 G RY

S W IT C HE S T H AT

M O VE T O G ET H ER

D AS HE D L IN E S HO WSA N O P E RAT IO N A LCONNECTIONB ET W EE N PA RT S

T W O C O NN E CT O R

C AV IT IE S IN T HE

S A ME C O NN E CT O R

D AS HE D L IN E S HO WS

A P H Y SI C AL

CONNECTION

B ET W EE N PA RT S

W HE N C UR RE NT F LO WS

T HR OU GH C OIL , C ON TA CT

M OVES F RO M A TRES T T OA CT IVAT EO P OS IT IO N

3 RE D

" EX HA US T G AS "S E N SO R I ND I CAT O R

D IS PL AY S T HE

L IG HT ED W O RD S

"E XH AU ST G AS "

S C R EW T E R MI N ALC ON NE CT ED T O W IR E,

S H O W N S E PAR AT ED

r'?~--"'!'-\"~""):10,r';j'~'''----IIII

: ~SrARTI Off .__...,.. OffI RUN 15_ _ _ _ _ _ _ _

3 0 - - - - - - - - - - - - - - - - -1 I,III

T III

0 , ; ; _ 0 , ; ; ; :: ; ' ]

T HR EE P OL E,

T HR EE P OS IT IO N S WIT CH

D AS HE D L IN E S HO W S

O PE RATIO NA L C ON NE C TIO N

B ET W EE N PA RT S

F U El I NJ EC T IO NSYSTEM

.50RN

SYMBOLS

W IR E C H OI CE SF O R O P TI ON S

ICARBURETOR

SYSTEM

C ONN ECTO R

ATTACHED TOC OM P ONE NT

R EL AY S HO W N

W ITH N OCUR REN T

FLO WIN GTHR OUG H

COIL

1 BL K

G5 1G RO UN DIN G J UN CT IO N

SINGLE

FILAMENT

BULB

DOUBLE

FILAMENT

BULB

DIODE

C UR RE NT C AN

FLO W ONLY IN

T H E D IR E C TI O NO F T HE A RR OW

FIAT SPIDER 3


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ELECTRICAL TROUBLESHOOTING

TROUBLESHOOTING PROCEDURE

1. Check the ProblemOperate the problem circuit yourself to besure you understand what's wrong. Don'twaste time fixing part of the problem!

2. Read the Electrical DiagramStudy the diagram to understand howthe circuit should work. Read the detaileddescription.

3. Find the Cause and Repair ItUse the Troubleshooting section witheach circuit.

4. Test the RepairOperate the "repaired circuit in all waysto be sure you have fixed the wholeproblem.

TROUBLESHOOTING TOOLS

The troubleshooting procedures describedhere require the use of common electricaltest equipment.

Test Light: A 12-volt bulb with a set oftest leads.

Used for voltage check, short check.

Test Light

Self-Powered Test Light: a bulb, battery,and set of test leads wired in series.

Used for continuity check, ground check.

Self-Powered Test Light

Jumper Wire: a fuse holder with a set oftestleads.

Used for bypass ing open circuits.

Jumper Wire

VOLTAGE CHECK

1. Connect one lead of Test Light to aknown good ground or negative (-)battery terminal.

2. Connect other lead of Test Light to con-

.. nector or terminal.3. If bulb goes on, there is voltage present .

O P EN W H ENOPERATED

SWITCH

C LO S ED W H EN

OPERATED

1 / _ -

$ TESTL I G H T(O R-= VOLTMETER) SOLENOID

Voltage Check


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FINDING A SHORT

1. Remove blown fuse and disconnect load.2. Connect Test Light across fuse terminals.3. Beginning near the fuse block, move the

harness from side to side while watchingthe Test Light. "

4. If bulb goes on, there is a short to groundin the wiring. Somewherein that area thewire insulation has worn away and thecircuit is grounding.

. ._ . .. .. .. .~ F US E

HOLDERB L O W NF U S E

~~;.;...;;.;a R E M O V E D

TESTLIGHT

SWITCHO P E N W H E NOPERATED

S H O RTCIRCUIT

SWITCHC L OS E D W H E NOPERATED

DISCONNECTLOAD

Finding a Short

CONTINUITY CHECK

NOTICE: Be sure no voltage is present incircuit during this test to avoid over-current and damage to parts.

1. Connect one lead of Self-Powered TestLight to one end of the circuit, and theother lead to the other end.

2. If bulb goes on, there is continuity.Switches can be checked the same way.

B L O W E RSWITCH

Continuity Check

GROUND CHECK

NOTICE: Be sure no voltage is present incircuit during this test to avoid over-current and damage to parts.

1. Connect one lead of Self-Powered TestLight to a known good ground, and the

other lead to the wire in question.2. If bulb goes on, there is a good ground.3. If bulb stays off, there is no ground.

ELECTRICAL TROUBLESHOOTING

GENERAL TROUBLESHOOTING HINTS

If several circuits fail at the same time,chances are the power (fuse) or groundcircuit is faulty.

Use the Fuse Block and ChargingSystem/Power Distribution information tofind out which circuits are powered througheach fuse.

Use the Ground Distribution diagrams tofind out which circuits have a commonground. Many car electrical problems aregrounding faults.

FIAT SPIDER 5


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FUSE DATA

TERMINAL NUMBERS

12 6 1

A

3 27 5 41 10 8

N L BEG F

FUSE LETTERS

D c

Figure 1 - Fuse Block

PROTECTED CIRCUITSFuse A (8-Amps)Brake indicatorFasten seatbelt indicatorSeatbelt timerSeatbelt relay coilGear selector lightBackup/stop lightsFuel warning indicatorFuel gaugeCoolant temperature gaugeTachometer

Oil pressure warning indicatorTurn lights"Exhaust Gas" sensor indicator

Fuse I (8-Amps)Accessory socketCourtesy lightClockSeatbelt chimePower antennaHazard lightsHi-Lo beam switch

Fuse C (8-Amps)LH headlight, hi beam

Fuse D (8-Amps)RH headlight, hi beam

Fuse E (8-Amps)LH headlight, 10 beam

Fuse F (l6-Amps)RH headlight, 10 beam ~

Fuse L (16-Amps)Horn relayCooling fan motorFuse G (8-Amps)

LH rear marker lightLH taillightLH license light

Fuse M (l6-Amps)LH power windows

Fuse N(16-Amps)RH power windowsuse B (8-Amps)

Windshield wiper/washer switch assemblyWindshield washer pumpWindshield wiper motor assemblyHeater fan switchLambda sensor switch unit

Fuse H (8-Amps)RH rear marker l ightRH taillightRH license lightDash panel lightsLights-on indicator


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RELAY PANEL

STARTERRELAY

FUEL INJECTIONRELAY SET

WARNINGCHIMES

POWER

WINDOWRELAY

SEATBELT

TIMER

FIAT SPIDER 7


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.8 BlKIVI O

}~~.~~:(..:"~:,':, ,~ . . .. ' .\1 " , . . " , . " " : ," . : ' 1

IN S T R U M E N T P A N E L G R O U N DWIPERIWASHERSWITCH

.8 WHT/BLK

1 W H T / B LK

C2 7

18LK

.8 WHT/BLK

.8 WHT/8LK

F U E L I NJ EC T I O NSYSTEM

~I! : .8M!! . ! !A ill RHC3 2

BACKU P POWER ~ POWER ~SWITCH SWITCH !QM WINDOW ~

SWITCH SWITCH

.8 BLKIVI O

8 FIAT SPIDEll

. 8 W H T / B L K

1 W H T / B L K

. 8 B L K IV I O

1 RE D

. 8 B L K N lO

.8WHTIBL K

.8 BlKlVlO

2.5 Bl K

COURTESYLIGHT

1 WHT/BLK


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GROUNDS

R H F R O N T G R O U N D IN G J U N C T IO N

WIPERM O T O R

r~-':"1I I I, II .. I

9

C A RB U RE TO R S Y ST EM

.0 BlKlVlO

RH FRONT RH FRO NTM ARKER PA RK /TU RN

!:!ill I I G H T S

1 Bl K 1 Bl K 1 BlK

( N O C O N NE C T IO N )

9 9 9 9

R E A R L IG H T S G R O U N O

1 BlK

1 WHT/BlK

RADIATOR

~

2.5 BlK

2.5 BlK

lH F RO NT

MARKER

LIGHT

1 B lK

lH F RO NTPARK/TURN

LIGHTS

1 B lK

L H F R O N T G R O U N O IN G J U N C T IO N

FUELI NJ EC T IO N S Y S T EM

. 8 B l K IV I O

1 .5 B l K 1 B lKBl K

FIAT SPIDER 9


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CHARGE/POWER DISTRIBUTION

1 BLK .8 BLKIV IO 6 BL K

4 BL Km.8 BLKIVIO

F U EL I NJ EC T IO N

SYST EM

CA R BUR E TOR

S YSTE M

.8 LT BLU /BLK ~ FRO M FU SE)~~- BL O CK

~.;~, FACING P AG E

" 1. 8 P N K/

.8 L T B LU /BL K

FU EL

INJECTION

IOLES H UTO F F

F U E L I N JE C T IO N

SY S TEM1 8 RN

1 B RN

1 B RN

2.5 2.5 VIO

LT

BL U

COO LI NG

FA N

68RN

FUe l

INJECTION

18LK

2.5 BL K

HORNS

. 8 R E D /B L K

WIND SHIEL DW IP ER / .8 R ED/8LK

WAS HER

C l O

1 W H T .8 R ED/BLK

HEAT E R R EM O VEK E Y WA R NI NG

CLOCK COURTESYLIGHT


14/62


y.8 YEl/9l K, .8 YEll ,

BL K.8 YEll BLK \..

- - - ...' ;


15/62


CIRCUIT OPERATIONCharge

With the IGNITION SWITCH in "Run,"12volts are applied through the GRNwire,BRN wire, IGNITION SWITCH terminals30 and INT and the BATIERY CHARGEINDICATOR.If the ALTERNATOR is not working,current flows through the BATTERYCHARGE INDICATOR and the ALTER-NATOR D terminal to ground. The bulbgoes on.

If the ALTERNATOR is working, itpowers all car electrical equipment andcharges the BATIERY. Alternating currentis generated by the stator as the fieldrotates. The rectifier bridges change thealternating current to direct current. Equalvoltage is applied through terminal D tothe other side of the indicator bulb. Theindicator bulb does not go on.

The amount of DC voltage produced bythe ALTERNATOR is controlled by theregulator. When the ALTERNATORoutputvoltage is low, the regulator increasescurrent flowing through the field. Thisincreases the ALTERNATOR output

voltage (at terminal B ). Field current issupplied directly from the stator's outputthrough the diode trio.

Power Distribution

These pages show circuits with commonpower feeds. FUSES C, D, E and F are notshown here since they are used only in theHeadlights circuit. FUSES M and N arealso not shown here since they are usedonly in Power Windows. Use these pages as

COMPONENT LOCATIONAccessory Socket .Cigar Lighter

In-Line Fuse .Fuse Block .Ignition Switch .

Light Switch ..Power Antenna Switch .Radio Capacitor .Seatbelt Timer .Starter Assembly .C7 (1 cavity) .C16 (5 cavities) .

C17 (4 cavities)

C18 (12 cavities) .

C20 (8 cavities) ..C22 (11 cavities) .C24 (7 cavities) .C28 (3 cavities) ..C30 (2 cavities) ..C31 (5 cavities) .C32 (7 cavities) .C33 (7 cavities) ..C36 (8 cavities) .C37 (2 cavities) ..G4 .

Page-FigureSteering column support, behind fuse block. . 30-1

Under dash panel, behind fuse block .Under LH side of dash panel .Lower RH side of steering column .

Dash panel, to left of fuel gauge .Center console, below radio .Behind center of dash panel, near radioMounted on RH side of relay panel .Lower LH rear side of engineLH front fender, behind alternator .Under RH side of dash panel, above LH side ofrelay panel .

Under dash panel at base of steeringcolumn support .

Under dash panel at base of steering

column support .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Below dash panel, behind ignition switch .Below dash panel, behind ignition switch .

"Behind center of dash panel .Behind center of dash panel ..Behind center console, near heater fan .Under console, near shift selector .Attached to right of battery ..

35-16-1

18-5

37-155-2

7-1, 49-4

18-2

58-2

36-1

35-131-131-135-231-118-518-555-155-158-137-218-4

a reference when you have a problem thatcan't be solved by looking at an individualcircuit page.

IGNITION/IDLE SHUTOFF


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H O T A T A L L T IM ES ~E. .~ . ,P ! l~ ! ! I_g !Hl ! j l ! ! l J ION

: "'. . I G N IT I O N

S W I T C H,-- .,- , .

C A R B U R E T O R

S Y S T E MR E O

M.!lli!N O I S EC A PA C I T O R

f~ : 1.~ ,,{:ii'

-rl E C T R O N I C

C O N T R O LU N I T

H I T E N S I O N

C A B L E

T O F UE LI N J E C T I O NP AG E 2 0

T O B A TT E RYC H A R G E

I N D I C AT O RPA G E1 0, 1 1R E A K E R l E S S

O IS T R I B U T O R

I DL E S H UT O FFS O L E N O I D

P R E V EN T S D I ES E L IN GW IT H E NG IN E O FF

S PA RK P LU G S

usrsnor 13


17/62

IGl\lITION/IDlE SHUTOFF

IGNITION

CIRCUIT OPERATION

The Marelli Ignition System consists ofan IGNITION COIL, ELECTRONIC

OCONTROL MODULE, and a BREAKER-

LESS DISTRIBUTOR. Power is availableto the IGNITION SYSTEM when theIGNITION SWITCHis in "Run" or "Start."

Ignition Coil

Voltage is applied to the IGNITIONCOIL primary from the IGNITIONSWITCH. The coil current is regulated bythe ELECTRONIC CONTROL MODULE,which is triggered by the PICK-UPASSEMBLY. The PICK-UP ASSEMBLY

sends impulses to the module. At the startof each impulse, the module grounds theIGNITION COIL primary through the BLKwire and terminal W.Whenthe primary coilcircuit is switched "On," a strong magneticfield is developed across the primary coil.At the end of each impulse, the circuit isswitched "Off." The strong magnetic fieldcollapses and induces a high voltage in thesecondary coil. This high voltage isdistributed to spark plugs through the

distributor rotor and cap.Electronic Control Module

The module switches the IGNITIONCOIL'S primary circuit "On" and "Off." Itincorporates a constant current limiter toprevent damage to the coil primary circuit.The module also analyzes the impulsesfrom the distributor's pick-up assembly toprovide proper dwell time and spark timingregardless of engine rpm. The coil also

provides the rpm signal to the tachometer,and to the ELECTRONIC CONTROLUNIT (in cars with Fuel Injection).

COMPONENT LOCATION

BreakerlessDistributor .

Radio Capacitor .Electronic Control

Module .

Idle Shutoff Solenoid .Ignition Coil .C22 (11 cavities) .C24 (7 cavities) .C31 (5 cavities) .

Page-Figure

Above rear of RH valve cover .Behind center of dash panel, near radio

15-2

Between ignition coil and RH front fender

LH side carburetor .Attached to RH front fender .Behind instrument cluster .Behind instrument cluster .Below dash panel, behind ignition switch .

24-2

18-343-131-135-218-5

Breakerless Distributor

The distributor is driven by the camshaftof the engine. The distributor shaft has atrigger in place of a breaker cam. The

PICK-UP ASSEMBLY mounted in thedistributor is electrically connected to theELECTRONIC CONTROL MODULE.

Pick-Up Assembly

The assembly consists of a pick-up coil,s tator pole, and a permanent magnet. Theassembly creates a magnetic field. Thetrigger has four teeth, 90 degrees'apart. Asa tooth passes through the magnetic field,itcauses an electrical impulse in the pick-up

coil. This impulse is fed to the ELEC-TRONIC CONTROL MODULE forcontrolling the coil primary circuit.

TROUBLESHOOTING

NOTICE: The following Special Notesapply to the Marelli Electronic IgnitionSystem:

- Do Not energize the ignition unless thecoil support base is properly grounded.

- Do Not crank the engine with the coilwire disconnected;

- Do Not disconnect the coil wire with theengine running.

- Do Not start the engine with theinstrument cluster disconnected.

- Do Not ground the coil lead to thetachometer (black wire), or usediagnostic equipment (or jumper wires)to ground the primary circuit.

- Do Not test for current or voltage by"flashing" terminals to each other or toground.

- The leads to the distr ibutor pick-upmaybe disconnected while the engine isrunning without damaging the system.

- Do Not disconnect the battery cables

while the engine is running; althoughthe ignition system can withstand apeak of 300 volts (for a period ofmicroseconds), the charging system(alternator/ electronic voltage regulator)will be damaged.

IF STARTER CRANKS BUT ENGINEWILL NOT TURN OVER:

Check for 12V at terminal 16 of theIGNITION COIL.

Check for proper grounding of theIGNITION COIL support mounting usingan ohmmeter. Connect meter betweencoil

-



18/62

support mounting and negative terminalof battery. Resistance should read .2ohms or less .

Check IGNITION COIL resistance withohmmeter. First disconnect wires fromcoil. To measure primary coil, read

between terminal 16 and terminal D.Reading should be 0.75 to O.Bl ohms. Tomeasure secondary coil read betweenterminal D and output to distributor.Reading should be 10,000 to 11,000 ohms.

Check distributor pick-up coil. Removeconnector from the ELECTRONICCONTROL MODULE and, with anohmmeter, measure resistance of pick-upcoil. The reading between the pins of theconnector should be 700 to 800 ohms.

Then move one of the meter leads to thedistributor body to check pick-upinsulator. Meter should read infinity (00).

Check the gap between stator pole andthe teeth of the trigger with a non-magnetic feeler gauge. Reading should be0.020-0.024 in. (0.5 to 0.6mm).

Check the ELECTRONIC CONTROLMODULE. Should only be checked afterthe pick-up coil has been checked to begood.

WARNING: Use insulated pliers to holdHI-TENSION CABLE while testing forspark. A high voltage shock is possible.

Disconnect the HI-TENSION CABLEfrom the distributor cap. Posit ion the endof the cable approximately less than a 1/4of an inch from the engine block. Rotatethe engine manually and look for a sparkas each tooth of the trigger passes thepick-up. This check can also be made with

the distributor removed by manuallyrotating the distributor shaft .

IDLE SHUTOFF(Carburetor System)

CIRCUIT OPERATION

With the IGNITION SWITCH in "Start"or "Run," current flows through the IDLESHUTOFF SOLENOID to ground. Thesolenoid operates and allows fuel to flow inthe carburetor idle circuit. When theIGNITION SWITCH is turned to "Off," thesolenoid does not operate and fuel flow inthe idle circuit is shut off to preventdieseling.


Figure 1 - Under RH Side of Dash Panel

Figure 2 - Top RH Rear of Engine WithCarburetor (Fuel Injection Similar)

FIAT SPIDR 15

STARTER


19/62

STARTER

S E E G R O UN D S

PAGES

.8 RED/BLK

'BRAKE

f!!!! .!! .lEVEL

SWITCH

.8 B LK/VIO

GU LP VALVE .~

ElEC TR OV Al VE

SOLENOID

P RE VE NT S G UL P

B YPA SS VA LV E

F R O M O P EN IN G

O U R IN G S TAR T IN G

2 ,5 B R N

M ANU AL

TRANSMISSION

AUTO MATIC

TRANSMISSION

T O F UE L

INJECTION 'CI-----.".RelAY SET

P AG E 2 1

.8 RED/BlK .8 RED/BlK

2 .5 R E O

2.5 RE D

AUTOMATIC

TRANSMISSION

ONLY

S TA RT ER /B AC K U P

S WIT CH A SS EM Bl Y' CL O SE D W IT H

, ~; rR A N S MI SS I ON I N

"'N EU TR AL" O R "P AR K"

C AR BU RE TO R S YS TE M

2.5 RE D

S EE G R O UN O S

PAGES

1 IIIi ii~ : - .. .. " ; ;_ ; '_ .CHARGE/POWERDISTRIBUTION

6 BR N

6 BR N

cn

C3 1

6 BR N

J( NO T U S ED )

STARTER


20/62

CIRCUIT OPERATIONWith Manual Transmission

Battery voltage is applied at all times toterminal 30 of the SOLENOID, andterminal 30 of the IGNITION SWITCH.

When the IGNITION SWITCHis movedto "Start," current flows through terminal50 of the SOLENOID, and both the hold-inand pull-in windings (to ground). The hold-in and pull-in windings work togethermagnetically to pull in the shifter. Currentthrough the pull-in winding also flowsthrough the MOTOR. The MOTOR beginsto turn slowlyto insure easy meshing ofthegear teeth. As the gears mesh, theSOLENOID contacts close.This applies fullbattery voltage directly to the MOTORthrough terminal 30.

When the IGNITION SWITCHis releasedfrom "Start," current from the IGNITIONSWITCH stops. Current from theBATTERY through the SQLENOIDcontacts now flows in the reverse directionthrough the pull-in winding, then continuesin normal direction through the hold-inwinding. The magnetic force of the hold-inwinding is opposed and cancelled by the

reverse current through the pull-in winding.The drive mechanism is spring-released andopens the SOLENOID contacts. Voltage tothe MOTOR is cut off.

With Automatic Transmission

With automatic transmission, batteryvoltage is also applied to terminal 30of theSTARTER RELAY at all times. When theIGNITION SWITCH is moved to "Start" ,voltage is applied through the STARTERRELAY coil, GRY/RED wire, and RED

COMPONENT LOCATION

Brake Fluid Level Switch ....Gulp Valve Electrovalve

Solenoid '..Ignition Switch .Starter Assembly ~ .

Starter/Back Up SwitchAssembly (automatic) .Starter Relay , .C6 (1 cavity) .C7 (1 cavity) .C31 (5 cavities) .C45 (2 ~avities) .G1 ' .G3 .

G4 .

Inside brake fluid reservoir .

LH front fender, behind G1 .Lower RH side of steering column .Lower LH side of engine .

At base of shift selector .LH side dash panel, attached to rear panel .LH front fender, behind alternator .LH front fender, behind alternator .Below dash panel, behind ignition switch .Under console, near shift selector .Attached to front LH fender .Attached under dash panel, above

ignition switch .Attached to right of battery ..

""t!

STARTER

Page-Figure

18-3

27-118-5

37-17-1, 18-1

18-218-218-537-249-2

T'ROUBLESHOOTINGIF STARTER MOTOR DOESN'T RUN:

Check BATTERY for full charge. Check that G4 is clean and tight. Check that STARTE'R ASSEMBLY

terminal 30 and BATTERY connectionsare clean and tight.

IF GULP VALVE ELECTROVALVEDOESN'T ENERGIZE IN "START":

Check that G5 is clean and tight. Check C6.

wire to the STARTER/BACK UP SWITCHASSEMBLY. If this switch assembly isclosed, current flows through the relay coilto ground. The relay contacts close, andcurrent flows through relay terminal 87,SOLENOID terminal 50 and operates theMOTOR as described above for manualtransmission.

With Carburetor SystemDuring starting, voltage is also applied to

the GULP VALVE ELECTROVALVESOLENOID. This prevents the gulp bypassvalve from opening.

With Fuel Injection System

During starting, voltage is directedthrough the RED/BLK wire to the FuelInjection circuit.

FIAT SPIDER 17


21/62

Figure 1 - Top of Relay Panel

Figure 3 - Top LH Rear Side of Engine - WithCarburetor (Fuel Injpction Similar)

18 FIAT SPIDER

Figure 2 - Behind Alternator - Fuel Injection

(With Carburetor Similar)

Figure 4 - Front of Trunk Figure 5 - To Right of Steering Column

COOLlNGP,AN


22/62

S E E P O W E R O I ST R IB U T IO N HOT AT ALL TIMES

2. 5 lTBlU

IT BL U

C OOL I N G

ff i ! l !MO TOR

2 .5 B lK

2.5 BL K

RA OIATO RCOO LI NG

2.5 BL K

_illS EE G R OU ND S P AG ES

COMPONENT LOCATIONCooling Fan Motor .Fuse Block .Radiator Cooling Fan

Switch .C4 (2 cavities) .. : ,,' .. " .

C5 (2 cavities) .. " .. " "

Page-Figure

Behind radiator .Under LH side of dash panel .

Lower LH rear comer of radiator .Forward LH front fender apron .Behind LH side of radiator, belowradiator hose .

Attached to front LH fender "1 .

6-1

19-219-1

43-249-2

CIRCUIT OPERATIONVoltage is applied at all times through

FUSE L and the COOUNG FAN MOTORto the RADIATOR COOLING FANSWITCH. If the coolant is too hot, theswitch closes, grounding the motor through

Gl.

With Fuel Inject ion(Carburetor Similar)

TROUBLESHOOTINGIF COOLING FAN DOESN'T RUN:

Check FUSE L by sounding HORN. Check RADIATOR COOLING FAN

SWITCH by disconnecting C4 andgrounding the BLK wire with SWITCH

IGNITION "Run."

Figure 2 - Behind Lower LH Side ofRadiator

,

F I AT S P I D ER 19

FUE~.INJECTION


23/62

WH T 40

WHT 32

1.5 BRN 1.5 BRN

;),0 1'//\7 SI'IlJEfI

H OT IN S TA RT O R R UN

6 B RN

F R O M ,

P O W E R ~DISTRIBUTION ~.PAGE 11 ~

. 1.5P NKi", 1

FUelWTORNO.3

W HT 37 AIR

FLOWSENSORWH T 29

{ilWH T 20HT 10

WH T 33HT 33HT 14

T H R O T T l EPLATE

SWITCH

FUEL INJECTION


24/62

H O T A T ALL T IM E S SEE P O W ER DIST RIBUT IO NfROMIGNITIONS WITCH(STARTER)

P AG E 1 6

.8 RED/BL K

F U E L I NJ E CT IO N

IN lIN E F US E

W HT

A U XIL IA RY A IR R EG U LA TO R( C L O S E D )

W HT 48

COL DSTART

~SUPPLIES

A DDIT IO NA L

F UE L F OR 1 GR Y

C OLD S TA RT S O il PR ES SU RE

WARNING

INDICATOR

W HTU X IL IA R Y A IR R EG U L AT O R( O P E N )

AUXILIARY

AIRW HT 4

R E GU L ATO RB Y PA S S

B Y PA SS E S A IR PA ST/'--"-"


25/62

CIRCUIT OPERATIONThe Fuel Injection System senses the

amount of fuel needed for the properairlfuel mixture. The fuel is sprayed intothe air stream in the intake manifold. FuelInjection is made up ofthree major systems:

the fuel system, air system and electricalsystem.

A brief description of each major systemwill aid in understanding how the entireFuel Injection System operates electrically.

Fuel System

The fuel system consists of four FUELINJECTORS, one for each cylinder. Theinjectors deliver pulses of fuel at the correctpressure to the intake manifold and arecontrolled by the ELECTRONIC CON-TROL UNIT (ECU).

The system also provides additional fuelfor coldstarting. This is done by the COLDSTART VALVE, which is controlled by theTHERMO TIME SWITCH. The COLDSTART VALVE operates with theIGNITION SWITCH in "Start" and theTHERMO TIME SWITCH closed.

Air System

The air system measures the amount ofair drawn into the engine, as well as itstemperature, and provides this data to theECU as input signals. The system alsoprovides bypass air circuits for coldstarting.

The AIR FLOW SENSOR contains anAIR FLOW POTENTIOMETER, FUELPUMP SWITCH and an AIR TEMPER-ATURE SENSOR.

The AIR FLOW POTENTIOMETER islinked to a plate which senses air flow into

COMPONENT LOCATION

Air Flow Sensor .Auxiliary Air

Regulator .Cold Start Valve .Coolant Temperature

Sensor .Electronic Control

Unit (ECU) .

Fuel InjectionIn-Line Fuse .

Fuel Injection RelaySet .

Fuel Injectors .

Fuel Pump .Ignition Coil .Lambda Sensor .Lambda Sensor Switch

Unit .

Oil Pressure Sender .Thermo Time Switch .Throttle Plate Switch

C16 (5 cavities) ..

C19 (1 cavity) .

C22 (11 cavities) .C32 (7 cavities) ..G3 .

G4 .G 5 .G 7 .G8 .

To left of RH front fender .

Top of engine, behind belt assembly .Connected to front of intake manifold .

Front of engine .

Under RH side of dash panel, to rightof component board .

Under dash panel, behind fuse block .

Top LH front corner of relay panel .LH side of engine, below intake manifold .

Under LH rear of carAttached to RH front fender .Connected to rear of exhaust manifold .

Under LH side of dash panel, aboveaccelerator pedal .

Lower LH side of engine, above oil filter .,LH side of engine, below fuel injectors .RH side of intake manifold, on front

of throttle assembly .Under RH side of dash panel, above LH side

of relay panel .Under dash panel, base of steering

column support .Behind instrument cluster .Behind center of dash panel .Attached under dash panel, above

ignition switch .Attached to right of battery ..In trunk, near LH rear lights .Attached to RH side of intake manifold .Attached to RH side of intake manifold .

Page-Figure

25-4

24-424-1

25-3

24-2

30-1

58-225-6

43-12 5-2 , 2 5-3

24-318-225-5

24-1

58-2

30-131-155-1

18-518-430-225-525-5

FUEL INJECTION


26/62

the engine. The potentiometer senses theposition of the plate and sends a voltagesignal to the ECU for fuel metering.

When air flow is present, the FUELPUMP SWITCH closes. This energizes thefuel pump relay coil. The relay contacts

close and the FUEL PUMP is operated.The AIR TEMPERATURE SENSOR

measures air temperature and provides aninput signal to the ECU. The ECU uses thesignal to adjust the amount of time eachFUEL INJECTOR is open (to compensatefor cold air intake).

The AUXILIARY AIR REGULATORcontrols air flow thru a bypass around thethrottle plate. This provides additional airduring cold starts and warm up. The ECUresponds to this additional air by meteringmore fuel to the engine, raising the idlespeed.

Electrical System

The electrical system controls the flowoffuel in order to have the correct air/fuelratio for all operating conditions. The ECUreceivesthe input signals and computesthecorrect output signal to the control relay.

With the IGNITION SWITCHin "Start"or "Run," current flows through terminal86c of the FUEL INJECTION RELAYSET(relay set), the coil of the control relay,terminal 28 of the ECU to G7. The controlrelay contacts close. Current then flowsfrom the BATI'ERYthrough the contacts ofthe control relay, the FUEL INJECTORS,and the ECU to G7. Because the engine isnot yet running, there is no air flowand theFUEL PUMP SWITCH remains open.

With the IGNITION SWITCHin "Start,"current also flows through terminal 86a ofthe relay set and followsthree paths: 1)thecoil of the fuel pump relay, terminal 85,theECU to G7; 2)terminal 86, the control unit,to G8; and 3) terminal 86 to the COLDSTART VALVE and the THERMO TIMESWITCH.

Path 1 causes the contacts of the FUELPUMP RELAY to close.Current then flowsthrough C17 (from the BATI'ERY), theFUEL INJECTION IN-LINE FUSE, thecontacts\.of the relay, terminal 88d of therelay set,-the FUEL PUMP, to G5. Currentalso flows through terminal 88c ofthe relayset, the AUXILIARY AIR REGULATOR,the ECU, to G7.

Path 2 powers a start signal to the controlunit at terminal 4.The ECU is then allowedto ground the FUEL INJECTORS (throughG7), allowing them to operate.

Path 3 powers the COLDSTARTVALVEthrough the THERMO TIME SWITCH(when starting with the coolant tempera-ture below95F).The switch remains closedand the COLD START VALVE operates,until: 1)the coolant temperature goes above

95F; or 2) the current flow through theheater in the switch generates enough heatto open the switch.

With the IGNITION SWITCHin "Run,"current no longer flows from terminal 86ato operate the fuel pump relay. With theengine running, however, there is air flowto the intake manifold. This causes thecontacts of the FUEL PUMP SWITCH toclose. Current then flows from theBATI'ERY, through the contacts of the

control relay, terminal 88a of the relay set,

the FUEL PUMP SWITCH,terminal 86b ofthe relay set, the fuel pump relay coil,control unit terminal 28, to G7. The fuelpump relay contacts remain closed and theFUEL PUMP operates. If the engine stopsor stalls, the FUEL PUMP SWITCHopens,stopping the FUEL PUMP.

The COOLANT TEMPERATURESENSOR provides an input signal that tellsthe ECU to provide the extra fuel necessaryduring warm up.

The IGNITION COIL sends an inputsignal to the ECU that provides enginespeed information. The ECU constantlycontrols the FUEL INJECTORS accordingto this signal. During deceleration, the

IGNITION COIL also transmits adeceleration mode signal to the ECU to stopinjection of fuel.

The THROTTLE PLATE SWITCH islocated on the throttle shaft (which isoperated by the accelerator pedal). Theswitch indicates whether the throttle is atidle, full throttle, or in between. The switchthen signals the ECU accordingly.

The LAMBDASENSOR is located in theexhaust system. It is an oxygen sensorwhich measures the oxygen concentrationof the exhaust gases, and sends an inputsignal to the ECU.

When the car is moving, the SPEED-OMETER sends pulses to the LAMBDASENSOR SWITCH UNIT. The LAMBDASENSOR SWITCH UNIT contact closesevery 30,000miles. This grounds the "EXH.GAS SENSOR" INDICATOR to remind theowner of the need to replace the LAMBDA

SENSOR. When the engine is being started,the OIL PRESSURE SWITCHgrounds theindicator to test its bulb.

FIAT SPIDER 23

FUEL INJECTION


27/62

TROUBLESHOOTINGFor troubleshooting, refer to the Fuel

Injection Diagnosis Manual.

.,./1 _.. . _

Figure 1 - Top Front of Engine

Figure 3 - Under LH Side of Dash Panel,Right of Steering Column


Figure 4 - Top Front of Engine


28/62

Figure 1 - Behind Radiator

Figure 4 - RH Front Fender

Figure 2 - Lower RH Side of Engine

Figure 5 - Lower LH Side of Engine

Figure 3 - Above Windshield Washer Reservoir

Figure 6 - LH Side of Engine

FIAT SPIDER 25

HEADLIGHTS


29/62

S E E P O W E R D I ST R IB U T IO N HO T IN S TA RT O R R UNO T A T A LL TIM E S

1 W H T / B lK

. 8 G R N l B lK . 8 G R N /B l K

26 FIAT SPIDER

1 B lK

C3 l

2 .5 lT B LU

L IG H TS : M A R KE RTAilLICENSE

S E E G R OU N DS PA GE S

P O W E RDISTRIBUTION

HEADLIGHTS


30/62

CIRCUIT OPERATION

With the IGNITION SWITCHin "Start"or "Run," voltage is applied to the LIGHTSWITCHand hi-beam flasher of the HIILOBEAM SWITCH.

With the LIGHT SWITCHin "Head," the

dimmer switch of the HIILO BEAMSWITCHdirects current through the FUSEBLOCK to either the "Lo" or "Hi"HEADLIGHT filaments and HI-BEAMINDICATOR. With the dimmer switch in"Lo," current flows through FUSES E andF, the "Lo" HEADLIGHT filaments and toground. With the dimmer switch in "Hi."current flows through FUSES C and D, the"Hi" HEADLIGHT filaments (to ground)and the HI BEAM INDICATOR.

Voltage available through the BRN wireis used for the hi-beam flasher regardless ofthe position of the LIGHT SWITCH. Withthe flasher closed, current flows through theDK BLU wire, and to the "Hi" HEAD-LIGHTS filaments in the same manner asdimmer switch in "Hi."

TROUBLESHOOTINGIF ONE HEADLIGHT DOESN'T WORK

IN EITHER "HI" OR "LO":

Check its ground.

IF THE "HI" OR "LO" FILAMENT OFONE HEADLIGHT DOESN'T WORK:

Check its FUSE. Check the lamp.

IF BOTH HEADLIGHTS DON'T WORKIN "LO":

Check continuity of dimmer switch in '

"Lo."

COMPONENT LOCATION

Fuse Block .Hi/Lo Beam Switch .Light Switch .C2 (2 cavities) .

C8 (2 cavities) .C20 (8 cavities) ..C22 (11 cavities) .' .C26 (5 cavities) ..C31 (5 cavities) .G1 .G2 :. .G3 :' .

Under LH side of dash panel .Upper LH side of steering column .Dash panel, to left of fuel gauge .LH front fender, near early fuel

evaporation canister .

RH front fender, near ignition coil .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Below dash panel, behind ignition switch .Attached to front LH fender .Attached to front RH fender .Attached under dash panel, above

ignition switch .

Page-Figure

6-131-1, 37-131-3, 37-1

27-1

33131131135-2185492331

185

IF BOTH HEADLIGHTS DON'T WORKIN "HI":

Check dimmer switch by operating Iri-beam flasher.

Figure 1 . LH Front Fender . With Carburetor(Fuel Injection Similar)

I ' /IIT SPIDER 27

TUBN/HAZARD LIGHTS '. ' ' '., " I , \. ' ~ " '


31/62

H O T IN 'S TA R T O R R U N S EE P O W ER D IS T RI BU T IO N H OT AT A LL T IM ES

1 R ED

I lTBLU/WHT

P O W E R

DISTRIBUTIONTURN/H A Z A R DFLASHER

ACCESSORY

llim

POWER

DISTRIBUTION

10K B lU

1 VI O 1 VI O

. 0 R E D/Bl K

POWER

DISTRIBUTION

H A Z A R DSWITCHA L S OS H O W NA B O V E

,8 BLKIVIO1 IT B lU /B lK

1 LT B lU / Bl K1 LT Bl U

J :l... C9!I -

l lTBlU rl)J .

YE l R H R EA R

! J !! ! ! ! ! IT( LIGHT,I A SS EM B l Y

TURN/PARK ILIGHT YE l

I,PARKI URN-- (1 B lK

C4 1

! Q 1S EE G R O UN DS S EE G R OU N DSPAGES PAGES

~TURN/PARK

, LIGH T

PARKITURN--

1 Bl K

!G 2

,0 BlK!VIO

1 LT B lU

1 W H T / B lK

.OWHTBl K

,8 W H T /Bl K

TURN/HAZARD LlG~ITS


32/62

CIRCUIT OPERATION

Turn

With the IGNITION SWITCHin "Start"or "Run," voltage is applied through FUSEA and terminals 15and 49of the HAZARDSWITCH to the "+" (positive) terminal ofthe TURN/HAZARD FLASHER. With theTURN SWITCH in "R," current flowsthrough the VIO wires, TURN SWITCH,and LT BLU wires to both the RH FRONTTURN/PARK LIGHT (to G2) and RHREAR TURN LIGHT (to G5). TheTURN /HAZARD FLASHER opens andcloses the circuit, flashing the lights. Theflasher also directs current through theTURN INDICATOR to G3. With the TURNSWITCHin "L," similar current flowtakesplace to the LH lights.

The HAZARD INDICATOR glows dimlywhen supplied from the INSTRUMENTLIGHTS circuit through terminal 58a andthe resistor.

Hazard

Voltage is applied at all times throughFuse I to terminal 30 of the HAZARDSWITCH. With the HAZARD SWITCH in"Hazard," current flows through terminal49, the TURN/HAZARD FLASHER, bothHAZARDSWITCHterminals Land R, andthe REAR TURN LIGHTS and FRONTTURN/PARK LIGHTS to Gl, G2, G3 andG5. The flasher opens and closes the circuitas it does for the turn signals, flashing thelights and TURN INDICATOR. Currentalso flows through the HAZARDINDICATOR to G3.

COMPONENT LOCATION

Accessory Socket .Fuse Block .Hazard Switch ..

(With Carburetor) .(With Fuel Injection) e

Turn/Hazard Flasher .Turn Switch .Cl (2 cavities) .C9 (2 cavities) .C18 (12 cavities) .

C20 (8 cavities) ..C22 (11 cavities) ..C26 (5 cavities) .C32 (7 cavities) ..C41 (6 cavities) ..

C42 (6 cavities) .C43 (7 cavities) .G1 .G2 .G3 .

G5 .

Steering column support, behind fuse block ..Under LH side of dash panel .

Middle of dash panel ..Center console

Attached to steering column supportUpper LH side of steering column .Forward LH front fender apron .Forward RH front fender apron .Under dash panel, base of steering

column support .Behind LH side of instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind center of dash panel ..Connected to LH side of RH rear lights .

Connected to RH side of LH rear lights .Connected to 'LH side of LH rear lights .Attached to front LH fender .Attached to front RH fender ..Attached under dash panel, above

ignition switch .In trunk, near LH rear lights .

Page-Figure

30-16-1

55-1

31-3,37-149-233-1

35-131-131-135-255-130-3

30-230-249-233-1

18-530-2

TROUBLESHOOTING

Turn Lights

IF ALL TURN LIGHTS AND TURNINDICATOR DON'T GO ON:

Check FUSE A by operating SEATBELTWARNING.

Check flasher and C32 by operatingHAZARD SWITCH.

Check for continuity between terminals15 and 49 of HAZARD SWITCH.

IF EITHER REAR TURN LIGHTDOESN'T GO ON:

Check bulb.

IF BOTH REAR TURN LIGHTS DON'TGO ON:

Check that G5 is clean and tight.IF THE LH FRONT TURN/PARK LIGHTDOESN'T GO ON:

Check bulb. Check ground.

IF THE RH FRONT TURN/PARK LIGHTDOESN'T GO ON:

Check bulb. Check G2 by operating the WIND-

SHIELD WASHER PUMP.

F/!\7' SHOEII 29

TURN/HAZARD LIGHTS


33/62

IF ONLY THE PARK OR TURN FILA-MENT OF THE TURN/PARK LIGHTWORKS:

Check the bulb.

Hazard Lights

IF NO LIGHTS OR INDICATORS GO ONIN "HAZARD":

Check FUSE I by operating COURTESYLIGHT.

Check flasher and C32 by operatingTURN LIGHTS.

Check for continuity between terminals30 and 49 of HAZARD SWITCH.

Indicators (Turr~ and Hazard)

IF ONLY HAZARD INDICATOR DOESNOT GO ON IN "HAZARD":

Check continuity between terminals 49aand 31 of HAZARD SWITCH.

IF BOTH INDICATORS DON'T GO ON IN"HAZARD":

Check that G3 is secure.

Figure 1 - Under LH Side of Dash Panel

Figure 3 - RH Rear Lights

Figure 2 - LH Rear Lights


34/62

Figure 1 - LH Side of Dash Panel, BehindInstrument Cluster

Figure 2 - Base of Park Brake Assembly

.- DASH

PANEL

.._---- LH SIDE ----..f-- CENTER --t----- RH SIDE -----4

INSTRUMENT HI-LO BEAM WINDSHIELD WIPER/CLUSTER SWITCH WASHER SWITCH

TURN SIGNALSWITCH

CONSOLE

RELAY PANEL(UNDER GLOVE BOX)

Figure 3 - Dash Panel and Console Assembly

FIAT SPIDER 31

FRONT MARKER/FRONT PARK LIGHTS " . . . ",'. ' ,., . ". . ... ...

HO T AT ALL T IM ES H OT IN S TA RT O R R UN S E E P O W E R D IS T R IB U T IO N


35/62

,- - /'.8 ,.8 Y E ll , Y E l!

B lK ,B lK +T R U N K

, L IG H T

R E A RM A R K E R /TA I L !L I C E N S EL IG H T S ( lH )

32 F I AT S P I D ER

( NO T U S ED )

L I G H TS W I T C H

1 W HTi"K ~

.8 Y El! ,B lK

\._ /,)Y-.

C 18 "

.8 Y E ll ,

B lK , I\1

1 V E L

1 B lK

.8 Y E ll \

B L K ..

D AS H P AN EL L lG HT SI

L lG H T S O N I ND I CA T O R

.8 Y E l / B l K- - - \,

!: .!!...!!Q!!!M A R K E RL I G H T

.8 Y EL l ,

R E O \

.8 Y E l / R E D

/.8 Y E ll \R E D

R E D

/- .-C1 8-

.-----,\

1 Y EL 1 VEl 1 VEl

R H F RO NTT U R N / PA R K

uau

L H F R ON TT U R N / PA R KL I G H T

1 B lKB L K

P A R K T U R N P A R K T U R N

1 B lK

S E E

G R O U N D SPA G E S

F U S EB L O C K

.8 Y E l /

,,E A RM A R K E R !

TA I l !

L I C E N S EL IG H TS ( RH )

R H F RO NT~L I G H T

FRONT MARKER/FRONT PARK LIGHTS


36/62

CIRCLIIT OPERATION

Voltage is applied to the "Park" positionof the LIGHT SWITCH at all times. Withthe switch in "Park," current flows throughFUSES Hand G, each FRONT MARKERand FRONT TURN/PARK LIGHT toground.

Voltage is applied to the "Head" positionof the LIGHT SWITCH only when theIGNITION SWITCHis in "Start" or "Run."This means that the lights will not go onwith the LIGHT SWITCHin "Head" unlessthe IGNITION SWITCH is in "Start" or"Run."

TROUBLESHOOTINGIF FRONT MARKER OR PARK LIGHTSDON'T GO ON IN "PARK":

Check continuity of LIGHT SWITCHandFUSE BLOCK by observing REAR TAILand MARKER LIGHTS.

IF FRONT MARKER OR PARK LIGHTSDON'T GO ON IN "HEAD":

Check continuity of LIGHT SWITCHandFUSE BLOCK.

IF ONLY THE TURN PORTION OF A

TURN/PARK LIGHT WORKS: Check the bulb.

IF LH FRONT MARKER AND PARKLIGHTS DON'T GO ON:

Check FUSE H by observing LH REARTAIL and MARKER LIGHTS.

Check that G1 is clean and tight.

IF RH FRONT MARKER AND PARKLIGHTS DON' T GO ON:

Check FUSE G by operating LH REARMARKER LIGHTS.

COMPONENT LOCATION

Fuse Block .Light Switch .Cl (2 cavities) .C3 (1 cavity) ..C9 (2 cavities) ..

CI0 (1 cavity) ..C18 (12 cavities) .

Gl .G2 .

Under LH side of dash panel .Dash panel to left of fuel gauge .Forward LH front fender apron .Forward LH front fender apron .Forward RH front fender apron .

Forward RH front fender apron .Under dash panel, base of steering

column support .Attached to front LH fender .Attached to front RH fender ..

Page-Figure

6-131-3,37-1

49-249-233-1

33-1

35-149-233-1

).

Check G2 by operating WINDSHIELDWASHER PUMP.

Figure 1- LH Front Fender - With Carburetor(FuelInjection Similar)

FIAT SPIDEll 33

R E A R MARKER/TAil/LICENSE LIGHTS/LIGHTS-ON INDICATOR TRUNK LIGHT

H OT A T A LL T IM ES H OT IN S TA RT O R R U Ns e E P O W E R O IS T R IB U T IO N


37/62

LI GH T

~

F R O N T

.8 YE L/R ED ,

\

,.8 Y EL /B LIC \

. 8 Y E L /B L K---

MARKER/.8 VE L/R EO \.. .- " ' , ' , ,-

~ ~ C 18

F R O N T.8 Y EL/BLK MA R K ER /

- - -. F R O NT PAR KL IG H TS ( LH )

F RO NT P AR K

L IG H TS ( RH )

s e E P O W E R , O IS T R IB U T IO N

- - -, ,- -"

~ C 3 3

.8 YEL/BLK ~

D A SH

PAN EL

L I G HT S

.8 YEL/BLK \

. 8 Y E L /B L K....--...-.",..,.,,-~..,.,......,.... ,~ T R U N K

~ LIG H T

,.8 VEL /R EO \

\

\'- --\

YE L

1 Y EL

VEl

1VEl

YE L

. 8 Y E L /B L K--- - - - - tr >/ / 1:28\

.8 YEL/RED \

C IG A R L IG H T ER

P AN EL L IG H T

R H R EA R

LIGHT

(N O T U SE D )

. 8 Y E L lB l K---..,~C26

1 VEl

. 8 W H T / Bl K

1 W H T / B lK

R H R EA RMARKER

LIGHT

. 8 W H T / B LK

S EE G R OU N DS P AG E S

REAR MARKER/TAIL/LICENSE LIGHTS/LIGHTS-ON INDICATOR


38/62

CIRCUIT OPERATION

Voltage is applied to the "Park" positionof the LIGHT SWITCH at all times. Withthe switch in "Park," current flows throughFUSE G to the LH REAR MARKERLIGHT and LH TAIL LIGHT (to G5), andLH LICENSE LIGHT (to case ground).Current also flows through FUSE Hand:1) the LIGHTS-ON INDICATOR to G3;2) the TRUNK LIGHT (to case ground);3) the RH LICENSE LIGHT (to caseground) and RH TAIL LIGHT and RHREAR MARKER LIGHT (to G5).

Voltage is applied to the "Head" positionof the LIGHT SWITCH only when theIGNITION SWITCHis in "Start" or "Run."This means that the lights will not go on or

stay on with the LIGHT SWITCH in"Head" unless the IGNITION SWITCHisin "Start" or "Run."

TROUBLESHOOTING

IF LIGHTS-ON INDICATOR DOESN'T

GO ON:

Check that C28 is tight . Check that FUSE BLOCKconnectors are

tight.

IF ALL SIX LIGHTS AND INDICATORDON'T GO ON:

Check continuity of LIGHT SWITCH byoperating FRONT MARKER LIGHTS.

IF INDICATOR GOES ON BUT ONE ORMORE REAR LIGHTS DO NOT:

Check that ground G5 is clean and tight. Check FUSE G. Check that connectors are tight.

COMPONENT LOCATION

Fuse Block .Light Switch .CI8 (12 cavities) .

C22 (11 cavities) .C26 (5 cavities) ..C28 (3 cavities) .C33 (7 cavities) .C40 (2 cavities) .C41 (6 cavities) ..C42 (6 cavities) .C43 (7 cavities) .C44 (2 cavities) .G3 .

G5 .

Under LH side of dash panel .Dash panel, to left of fuel gauge .Under dash panel, base of steering

column support .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind center of dash panel .Connected to center of RH rear lights .Connected to LH side of RH rear lights .Connected to RH side of LH rear lights .Connected to LH side of LH rear lights .Connected to center of LH rear lights .Attached under dash panel, above

ignition switch .In trunk, near LH rear lights .

Page-Figure

6-131-3,37-1

35-131-135-231-125-430-330-330-230-230-2

18-530-2

Figure 1 - Under LH Side of Dash Panel Figure 2 - Behind Instrument Cluster

FIAT SPIDER 35

BACK UP/STOP LIGHTS

H OT IN ST AR T O R R UN S E E P O W E R D IS T RI BU T IO N


39/62

HA ZAR D1 L T B LU /W H T

LIG HTS

1 LT B lU /W H TB R AK E WA R NI NG !

S E AT B EL T WA R N IN G

FUE L 1 W HT

I NJECT I ON

O N LV

T IMER

AU TOM ATICT R AN S MISSION

8lTBlU!

W HT .8 L T B L U !W H T

S E E P O W E R D IS T RI BU T IO N

FUS E

BLO CK

.8 VEl/BLK

---.

S TARTER !

B ACK U P

S WITC H

A S S EM B LY

\...IN DICATORS!GA UGE S

1 W HT

R EVE R SE

1 BL K P E DA L D E PR E SS E D

-.__;;:;....---------vii-::::::--' 1 RE D", C 31

1 W HTj.I.-

lW HT rr -_ -_ -_ -_ -l_ -R _-E ~-tr

VE L

YE L

Ve l

"' ; ;I : .RCAT C:Pln~n

lH R EA R

L I GHTA SS EM Bl V

=

Figure 1 - Under LH Side of DashPanel

Figure 2 - Top of Fuel Tank

CIRCUIT OPERATIONS COMPONENT LOCATION

BACK UP/STOP LIGHTS

P Fi


40/62

CIRCUIT OPERATIONS

In cars with automatic transmissions,with the IGNITION SWITCH in "Start" or"Run," voltage is applied through FUSE Ato the GEAR SELECTOR UGHT and theSTARTER/BACK UP SWITCH ASSEM-BLY.

In all cars, with the IGNITION SWITCHin "Start" or "Run," voltage is appliedthrough FUSE A to the BACK UP SWITCHand to the STOP LIGHT SWITCH. Whenthe transmission is shif ted to "Reverse," theBACK UP SWITCH closes and currentflows through the BACK UP LIGHTS toG5. When the brake pedal is depressed, theSTOP LIGHT SWITCH closes and currentflows through the STOP LIGHTS to G5.

TROUBLESHOOTING

IF GEAR SELECTOR LIGHT AND ALLTHE BACK UP AND STOP LIGHTSDON'T GO ON:

Check FUSE A by operating SEATBELTWARNING.

Check that G5 is clean and tight byoperating TURN LIGHTS.

COMPONENT LOCATION

Back Up Switch(Manual) .

Fuse Block .Seatbelt Timer .Starter/Back Up

Switch Assembly (automatic)Stop Light Switch .C18 (12 cavities) .

C22 (11 cavities) .C32 (7 cavities) .C37 (2 cavities) .C41 (6 cavities) .C42 (6 cavities) .C43 (7 cavities) .G5 .

Page-Figure

In transmissionUnder LH side of dash panel .Mounted on RH side of relay panel .

6-149-4

At base of shift selector .Attached at base of steering column supportUnder dash panel, base of steeringcolumn support .Behind instrument cluster .Behind center of dash panel .Under console, near shift selector .Connected to LH side of RH rear lights .Connected to RH side of LH rear lights .Connected to LH side of LH rear lights .In trunk, near LH rear lights .

37-2

35-131-155-137-2

30-330-230-230-2

Figure 1 - LH Side of Dash Panel Figure 2 - Console at Gear Shift Selector-Automatic Shown

FIAT SPIDER 37

COURTESY LIGHTS

H OT AT ALL T IMES S E E P O W E R D I ST R IB U T IO N


41/62

S E l S P O W E . f \

DISTRIBUTION1 RE D .8 RED/BLK .8 RED/BLK . 8 R E D /B L K

1 RE D

1 WHT/BlK

C36

2. 5 BL K

S EE G RO U ND S P AG ES_ G3

~n _.. . _

.8 RED/BLK

C O U RT E SY L IG H T

r---1SEATBElTt t RELAYI I--I. II 8la tL. ._ . ....J

.8 BLK!VIO.8 BLK/VIO

~ L H D OO RJAMB JAMBSWITCH SWITCHCLO SED W ITH CLO SED W ITH

- =D OO R O PE N

- =O D OR O PE N

CIRCUIT OPERATION COMPONENT LOCATION

COURTESY LIGHTS

P g Fig


42/62

CIRCUIT OPERATION

Voltage is applied at all times throughFUSE I to the COURTESY LIGHT. Thelight includes a switch which grounds thebulb through G3, or the light can beoperated through the LH or RH DOORJAMB SWITCH.

TROUBLESHOOTING

IF INSTRUMENT PANEL COURTESYLIGHT DOES NOT WORK THROUGHITS OWN SWITCH:

Check FUSE I. Check in-line connectors. Check G3.IF LIGHT DOES NOT WORKTHROUGH DOOR SWITCHES:

Check case grounds. Check continuity of switches.

COMPONENT LOCATION

Accessory Socket .Door Jamb Switches .Fuse Block .Power Antenna Switch .Seatbelt Relay .C32 (7 cavities) ..C35 (8 cavities) ..G3 .

Page-Figure

Steering column support, behind fuse block.. 30-1In door jambs................................ 39-2Under LH side of dash panel................ 6-1Center console, below radio.................. 55-2Top rear of relay panel 7-1,49-4Behind center of dash panel 55-1Behind center console, near heater fan...... 58-1Attached under dash panel, above

ignition switch............................... 18-5

Figure 1 - Rear of Relay Panel Figure 2 - RH Door Jamb

F I AT S P ID E R39

DASH PANEL/CIGAR LIGHTER LIGHTS

H O T A T AL L T IM E S H O T IN S T A R T O R R U NS E E P O W E R O I ST R IB U T IO N

PA NEl


43/62

( NO T U SE O)

(NO T USEO ) \' V Y.8V EL I\ \

.8 VEl/REO \ BLK

~

.8 YEL/BLK

~-----

8 Y EL /R EO \

~

.8 Y EL/B lK / "'"1C( -__ ._ll

\ -

- -)~) r n - ,.8 YEl/BlK 1.

..... ll.8 YEl/BlK 1.

. .. .. C 3 8

.8 YE l

P O W E R O I S TR I BU T IO N

lIG HT S- O N

INOICATOR

-.....(

\\\\\\

.8 YEl/BlK \

\\\\\

_J

PA NEl

LIGHTR HEO STAT

8 W H T /R E O

.8WHT/RE D

TUR N!

HAZARD

LIGHTS

.8 W HT/R E D

S EE G RO U ND S P AG ES

HA ZAR D

SW I TCH

. 8 B L K IV I O

.8 BlKlV1DC l2

D AS H P AN EL L IG HT

F IB E R O P TI CS S O UR C E

.8 WHT!RED

1 W HT

1 WHT/BLK

.8 WHT/BLK

.8 WHT/BLK

. 8 B L Ki w HT

S EE G R OU ND S P AG ES



44/62

. 8 W H T /R E D

.8WHT/RED

.8 WHT/RED8 W H T /R E D

TACHOMETER

1 WHT/BlK

.8WHT/BLK .8WHT/BLK

. 8 W H T / B l K

.8 WHT/RED

COOLANTTEMPERATUREG A U G E

. 8 W H T / B l K

FIAT SPIDER 41


CIRCUIT OPERATION COMPONENT LOCATION Page-Figure


45/62

CIRCUIT OPERATIONVoltage is applied to the "Park" position

of the LIGHT SWITCH at all times. Withthe switch in "Park," current flows throughFUSE H to the PANEL LIGHT RHEO-STAT and CIGAR LIGHTER light. Therheostat allows the lights to be dimmed.Current from the rheostat flows to theHAZARD SWITCH panel light to G3.Current from the rheostat also flowsthrough the DASH PANEL LIGHT toground and through the panel lights in theSPEEDOMETER, CLOCK,TACHO-METER, COOLANT TEMPERATUREGAUGE and FUEL GAUGE to G3.

TROUBLESHOOTING

IF DASH PANEL LIGHTS DON'T GO ON: Check FUSE H. Check that G3 is tight. Check continuity of PANEL LIGHT

RHEOSTAT.

COMPONENT LOCATIONFuse Block .C22 (11 cavities) ..C23 (5 cavities) .C24 (7 cavities) .C25 (4 cavities) .C26 (5 cavities) .C27 (3 cavities) .C28 (3 cavities) .C32 (7 cavities) ..C33 (7 cavities) .G3 .

Page-Figure6-1

31-135-235-235-235-242-131-155-155-1

Under LH side of dash panel .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind center of dash panel .Behind center of dash panel .Attached under dash panel, above

ignition switch . 18-5

Figure 1 - Behind Instrument Cluster Figure 2 - To Right of Steering Column


46/62

T O E LE C TR O N ICC ON TR OL M OI "

Figure 1 - RH Front Fender-With Carburetor(Fuel Injection Similar)

Figure 2 - LH Side of Radiator-With Carburetor

(Fuel Injection Similar)

Figure 3 - Under LH Side of Cowl Figure 4 - Behind LH Kick Panel

COWL

LH SIDE OF C A R

FRONTFENDERO RFRONTFENDERAPRON

Figure 5 - Body Part Locations (RH Similar)

FIAT SPIDER 43

INDICATORS/GAUGES

HOT IN STAR T OR R UN S E E P O W E R D I ST R IB U T IO N


47/62

STO PLIGHTS

1 W HTP OW ER

~", v ;, 'P~ DISTRIBUTION

.8 Y El/BLK \ ,_. 8 Y E l/ B LK----- - -,,-

~ C 2 5

1 Y El /B L K

- . 8 Y E l /BL K----COO LAN TT E MP E RAT U RE

1 W H T / BL K 1 G R N 1 W H T /B LK 1 W H T /B L K 1 G RY

C 2 2

---~ .- - - - - - - - - - - - - - - - - - - - -BWHT/BLK

RE O . B LT B LU /Y E l .BGRN/

WH T. 8 B R N tW H T

. 8 G RY /Y E l

.8 L T B LU IY El

. 8 W H T /

BL K. 8 G R N IW H T

--------_.,&-----_.- ----,--,-111------

" .S B R N IW H T

GAUG ES

( S P EEO OM E TER)

FROM

UIIII!~i4IH IGNITIONP AG E 1 3

FUEL

INJECTION

. 8 G RY /Y E L

. 8 B L K IW H T . 8 G RY /Y E l

F Uel G AU GE

S E ND E RS W IT C H C L OS E S

W H EN F UE L

S UP PLY D RO PSSEEG({QUNDS

PAG E S

~T EM P ERAT URESEN DER C L OS E D W IT H

LDWOIL

PRESSURE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INDICATORS/GAUGES

CIRCUIT OPERATION COMPONENT LOCATION Page-Figure


48/62

Gauges

With the IGNITION SWITCH in "Start"or "Run," current flows through FUSE Aand C22 to the'FUEL GAUGE, COOLANTTEMPERATURE GAUGE and the

TACHOMETER. The gauges each includetwo magnetic coils which pull on a pointerin opposite directions. The balancing effectof the two coils prevents errors that wouldresult from varying car voltage. In eachgauge, current through one coil also flowsthrough a sender. The sender controls thepointer by changing the amount of currentflowing through that coil. The constantcurrent flowing through the other coil flowsto G3.

In the solid state TACHOMETER, theIGNITION COIL primary pulses arechanged to a varying voltage, which movesthe pointer.

Indicators

With the IGNITION SWITCH in "Start"or "Run," voltage is applied to the FUEL

WARNING and OIL PRESSURE WARN-ING INDICATORS. Voltage is appliedthrough C23 and the FUEL WARNING

INDICATOR to terminal W of the FUELGAUGE SENDER. When fuel is low, theswitch inside the sender grounds theindicator and the bulb goes on. Voltage isapplied through C24 and the OILPRESSURE WARNING INDICATOR tothe OIL PRESSURE SWITCH. When theswitch closes, the INDICATOR bulb goeson.

Coolant TemperatureGauge Sender .... ,.,.,.,., ..

Engine Overheat Switch .Fuel Gauge Sender .Fuse Block .Coolant Temperature

Gauge Resistor .C18 (12 cavities) .

C22 (11 cavities) ..C23 (5 cavities) ..C24 (7 cavities) .C25 (4 cavities) ..G3 .

Beside spark plug number three .Beside spark plug number one .

Inside fuel tank .Under LH side of dash panel .

45-145-1

36-26-1

Under dash panel, above accelerator pedal ..Under dash panel, base of steering

column support .

Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Attached under dash panel, above

ignition switch .

36-1

35-1

31-135-235-235-2

18-5

TROUBLESHOOTING

IF FUEL GA UGE AND COOLANTTEMPERATURE GA UGE DON'T WORK:

Check that G3 is clean and tight. Check FUSE A by operating STOP

LIGHTS.

IF ONE GA U GE DOESN'T WORK:

Check its sender by disconnecting it. If itspointer then goes to maximum, the sender

is probably broken.

Figure 1 - Top of Engine-With Carburetor(Fuel Injection Similar)

FIAT SPIDER 45

CIGAR LIGHTER/CLOCK/REMOVE KEY WARNING/ SEATBELT WARNING/BRAKE WARNING

H OT A T A L L T IM ES S EE P O W ER O IS T RIB U TIO N

~

H OT A T A L L T IM ES H OT IN S TA RT O R R UNE E P O W ER D IS T RIB U TIO N S EE P O W ER D IS TR IB U T IO N


49/62

2. 5B L K

2. 5B L K

F U S ES A M P

P O W E RD I S T R I B U T I O N

ft;::::n::':';;;:"::'''''~;::f'''~ T U R N / H A Z A R DL I G H T S

IN ST R U M EN T C LU S T ER L IG H TS

B A C K U P IS T OP

.S W H T /B lK

1 W H T /

B lK

. S W H T /

B L K

1 W H T IB L K .0 W H T /

B lK

1 W H T/

B lK

1 W H T /

B lK

. S B l K /V I O

S E AT B E l T

!!!!@O P E N S

A F T E R

5 S E C O N D S

B E LT B U C KL E D

1 W H T / B lK

S EE G RO U N DS P A G E S

. S W H T / B lK

.8 B l K / V I O . S V I O /W H T

1 W H T /B lK W IN D S H IE L D

W I P E R /WA S H E R

P A R K

B R A K E

S W I T C HC L OS ED W I THP AR K B RA K E

- = O N

PA S S E N G E R ' S ~D O O R J A M B D D O R J A M B

S W I T C H S W I T C H

C LO SE D W IT H C L O SE D W IT H

D O O R O PE N D OO R O PE N

CIGAR LIGHTER/REMOVE KEY WARNING/SEATBELT WARI\IING/BRAKE WARNING

COMPONENT LOCATION Page-Figure


50/62

. 8 VI OJ l' lH T

B RA KE F lU IO

L EV El S W IT C H

C L O SE D W I TH

L O W B RA KE

flU ID LE VE L

CARBURETORSYSTEM

_ " " I V "I F U E L I NJ E CT IO NSYST E M

Door Jamb Switches .Driver's Seatbelt Switch .Fuse Block .Exh. Gas Sensor Indicator.Park Brake Switch .Remove Key Switch .Warning Chime .Seatbelt Relay .Seatbelt Timer .C18 (12 cavities) ..

C21 (6 cavities) .C22 (11 cavities) .C23 (5 cavities) .C24 (7 cavities) .C25 (4 cavities) .C27 (3 cavities) ..C28 (3 cavities) ..C30 (2 cavities) ..C32 (7 cavities) ..C33 (7 cavities) ..C35 (8 cavities) ..C36 (8 cavities) ..C37 (2 cavities) ..G3 .

In door jambs .Part of driver's seatbelt assembly .Under LH side of dash panel .In center dash panelVent controls, center portion .Part of ignition switch .Top rear of relay panel .LH side dash panel, attached to relay panelMounted on RH side of relay panel .Under dash panel, base of steering

column support .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument cluster .Behind instrument clusterBehind instrument cluster .Below dash panel, behind ignition switch .Behind center of dash panel .Behind center of dash panel .Behind center console, near heater fan .Behind center console, near heater fan .Under console, near shift selector .Attached under dash panel, above

ignition switch .

39-249-3

6-1

31-231-349-449-449-4

35-131-131-135-235-235-2

31-118-555-155-158-158-137-2

CIRCUIT OPERATION

18-5

Remove Key WarningVoltage is applied at all times through

FUSE I to the REMOVE KEYSWITCH. Ifthe key is in the IGNITION SWITCH, thevoltage is applied through the WARNINGCHIME, SEATBELT RELAY, andBLK/VIO wires to the DOOR JAMBSWITCHES. When either door is opened, itsDOOR JAMB SWITCH closes. Thisgrounds the circuit and the WARNINGCHIME sounds.

Voltage is available at all times throughthe IN-LINE FUSE to the CIGARLIGHTER. When the CIGAR LIGHTER isoperated, it is grounded through G3.

Current flows at all times through FUSEI to operate the CLOCK.

FIAT SPIDER 47

CIGAR LIGHTER/REMOVE KEY WARNING/SEATBELT WARNING/BRAKE WARNING

Seatbelt Warning

Wh h IGNITION SWITCH i d

If the park brake is on, current in thesecond path flows through the PARK

IF BRAKE INDICATOR DOESN'T WORKEXCEPT WHEN FIRST STARTING:


51/62

When the IGNITION SWITCH is turnedto "Start" or "Run," current follows threepaths through FUSE A to ground: 1)FASTEN SEATBELT INDICATOR, DKBLU/RED wire and SEATBELT TIMER toG3;2) SEATBELTTIMER terminal to G3;

and 3) SEATBELT RELAY coil, DKBLU/RED wire and SEATBELT TIMER toground. The first path lights the indicator.The second path operates the timer andopens the other two paths after about fiveseconds. The FASTEN SEATBELTINDICATOR will go off after 5 secondsregardless of the seatbelt switch. The thirdpath operates 'the relay and pulls in therelay contacts. If the DRIVER'SSEATBELT SWITCH is closed, it grounds

the WARNING CHIME. The WARNINGCHIME sounds until the belt is buckled orthe timer opens the current path.

Brake Warning

When the IGNITION SWITCH is turnedto "Start" or "Run," voltage is appliedthrough FUSE A and the BRAKEINDICATOR along three paths: 1)VIO/WHT wires and SEATBELT TIMERto G3; 2) VIO/WHT wires and PARK

BRAKE SWITCH to ground; and 3)VIO/WHT wires and BRAKE FLUIDLEVEL SWITCH to Gl. The first path isclosed from SEATBELT TIMER terminalC1 to G3 and current flows. The BRAKEINDICATOR goes on as a bulb test. Afterabout 5 seconds the SEATBELT TIMERopens the current path, and the test ends.

second path flows through the PARKBRAKE SWITCH (to ground). The indicatorgoes on as a warning.

The third path warns of low brake fluidlevel.

TROUBLESHOOTINGIF ONLY REMOVE KEY WARNINGDOESN'T SOUND:

Check continuity of DOOR JAMBSWITCHES by the operation of theCOURTESY LIGHT.

Check continuity between terminals 30and 87A of SEATBELT RELAY. If nocontinuity, replace relay.

IF ONLY SEATBELT WARNING DOES

NOT SOUND:

Check continuity of DRIVER'S SEAT-BELT SWITCH.

Check continuity between terminals 30and 87 of SEATBELT RELAY. If nocontinuity, replace relay.

IF WARNING CHIME DOESN'T'$OUNDFOR REMOVE KEY WARNING ORSEATBELT WARNING:

Check for voltage at WARNING CHIME.

Check REMOVE KEY SWITCH. Check FUSE I by operating CIGAR

LIGHTER.

EXCEPT WHEN FIRST STARTING:

Check continuity of PARK BRAKESWITCH.

Check BRAKE INDICATOR bulb.

IF FASTEN SEATBELT INDICATORAND BRAKE INDICATOR STA Y ONWHEN FIR ST STARTING:

Check SEATBELT TIMER.


52/62

,~.

Figure 1 - LH Door Jamb

Figure 3 - Behind Driver's Seat

Figure 2 - LH Front Fender-With Fuel

Injection (Carburetor Similar)

Figure 4 - Top of Relay Panel

FIAT SPIDER 49

POWER WINDOWS

. H OT A TA L L' T IM E S S E E P O W E R D I ST R IB U T IO N


53/62

2. 5 BlK

2. 5 BlK

SE E

GR O UN DS

PAG E S

1 .5 B R N /W H TF UEL INJECTIO N ~ ... ~_~_::.._, .. ~ F RO M L IG HT S WIT CH

S EE PAG E11

~ ,~ .. ,. .. ,. - . .. .. . S E AT B E l T

TIMER

.8 WHT/BlK

RH

POWER

WINDOW

SWITCH

SE E

GROUNDSPAGES

.8 WHT/BlK

1 WHT/BLKGROUNDS

CIRCUIT OPERATION

Wi O ti

COMPONENT LOCATION

Fuse Block

WIPER/WASHER

Under LH side of dash panel

Page-Figure

6 1


54/62

Wiper Operation

With the IGNITION SWITCHin "Start"or "Run," voltage is applied through FUSEB to the wiper switch and to the "Run"contact of the park switch.

Continuous OperationWith the WINDSHIELD WIPERI

WASHER SWITCH ASSEMBLY (switchassembly) in "Continuous" and the WIPERSWEEP SPEED SWITCH(speedswitch) in"Slow", current flows through terminals mand p of the switch assembly, to (but notthrough) C12, the GRY IBLK wire, theWIPER SWEEP SPEED SWITCH,LT BLUwire and the wiper motor to ground. Whenthe WIPER SWEEP SPEED SWITCH isplaced in "Fast," current is directedthrough the GRY wire and the motor toground.

Park Cycle

When the wipers are running, the parkswitch is in "Run". The park switch ismechanically linked to the motor andmoves to "Park" only when the wipers arein park position on the windshield. Whenthe switch assembly is placed in "Off,"

current to bring the wipers to the parkposition flows through FUSE B, the BRNwire, the LT BLU/BLK wire, the "Run"contact of the park switch, the GRY IBLKwire, C2I, to (but not through) C12, the"Slow" or "Fast" speed switch contact andthe motor to ground. The motor continues torun until the run contact opens and thewipers are parked.

Fuse Block .Windshield Washer Pump .Windshield Wiper

Motor Assembly .Windshield Wiper/Washer

Switch Assembly .

Wiper Delay Timer .Wiper Sweep Speed Switch .cn (2 cavities) .C12 (4 cavities) .CI3 (2 cavities) ..CI4 (2 cavities) .C15 (2 cavities) .C21 (6 cavities) .C29 (1 cavity) ..C33 (7 cavities) .G1 .G2 .G3 .

Under LH side of dash panel .Inside washer fluid reservoir .

6-143-1

Under RH side of cowl. . 43-3

Upper LH side of steering column........... 31-1

Attached to front of relay panel 39-1Center of dash panel......................... 31-3Next to washer fluid reservoir............... 43-1LH side dash panel, above relay panel ~ 39-1Under RH side of cowl, near wiper motor . . . 43-3Under RH side of cowl, near wiper motor . . . 43-3Under RH side of cowl, near wiper motor . . . 43-3Behind instrument cluster.................... 31-1Behind instrument cluster.................... 31-1Behind center of dash panel 55-1Attached to front LH fender . . . . . . . 49-2Attached to front LH fender................. 33-1Attached under dash panel, above

ignition switch.............................. 18-5

Delay OperationWhen the switch is placed in "Delay" and

the WIPER SWEEP SPEED SWITCHis in"Slow," current flows through switchassembly terminals m and n, the RED wireand to terminal 3 of the WIPER DELAY

TIMER. This current powers the timer. Itflows through terminal 4 of the timer, thenthrough switch assembly terminals 0 and Ito ground G3.A pulse of current also flowsthrough terminal 1 of the WIPER DELAYTIMER, C12, the WIPER SWEEP SPEEDSWITCH, the LT BLU wire and the motorto ground. This starts the wiper sweep andputs the park switch in "Run." The wiperscomplete the sweep as a park cycle, andwait for another pulse ofcurrent. When theWIPER SWEEP SPEED SWITCHis placed

in "Fast," current is directed through theGRY wire and the motor to ground.wait for another pulse of current. When theWIPER SWEEP SPEED SWITCHis placedin "Fast," current is directed through theGRY wire and the motor to ground.

Washer Operation

With the IGNITION SWITCHin "Run,"voltage is applied through FUSE B, theBRN wire and the YEL/BLK wire to thewasher switch. When the switch is closed,current flows through the WINDSHIELDWASHER PUMP to Gl. The pump squirtsfluid onto the windshield as long as theswitch is closed.

FIAT SPIDER 51

WIPER/WASHER

-rROUBLESHOOTING


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IF WIPERS DO NOT OPERATE IN"DELAY":

Check for voltage at LT BLU wire of C12. Check for voltage at RED wire of C12,

male pin.

Check for continuity to ground from YELwire of CI2 to G3.

IF WIPERS ONLY MAKE ONE SWEEPAND STOP:

Check for continuity from C13, throughthe park switch to LT BLU/WHT wire ofC12.

IF WIPER AND WASHER DOES NOT

WORK:

Check FUSE B.IF WINDSHIELD WIPER WORKS IN"SLOW" BUT NOT "FAST":

Check voltage at GRYwire. If there is novoltage present, check switch. If there isvoltage, check G2 and check motor.

IF WINDSHIELD WASHER PUMP DOES

NOT WORK:

Check continuity between terminals mand t of WINDSHIELD WIPERI

WASHER SWITCH ASSEMBLY, andbetween switch assembly and Gl.

Figure 1 - Top of Steering Column

Figure 2 - Inside Front of RH Door

Figure 3 - Behind LH Wheel Well

H OT A T A LL T IM ES SE EP OW ER

FU SE DISTRIBU TIONBLO CK

COMPONENT LOCATION

Fuse Block Under LH side of dash panel

HORNS

Page- Figure

6-1


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vl~

2.5 VIO ~1fu 1

~~!~i~


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ACCESSORY ~~ WARNING

SWITCH

1 BR N HI/LOBEAMSWITCH

PO WE R

DISTRIBUTION

1 LT B L UI R EO

P OW E R

W I NDO WS

1 BR N

1 RE D

. 8 R E D /B L KRE D~ .8 .R .E .D ./ B. L. K. C O UR TE SY

LIGHTS

. 8 O K B LU /R ED .8 L T B LU /W HT

POWER

~~

------ ---- ---- ----

"-NTENNACOAXIAL

CABLE

\~=1 W:::H::::T:::/B::::L:;::K:;:::. .. .. C O U RTE S Y, LIG HT

1 W H T /B L K

1 VIO

"~'"~

S EE G RO UN DS P AG ES

CIRCUIT OPERATION

With the IGNITION SWITCH in "Run"

COMPONENT LOCATION

Accessory Socket .

RADIO/POWER ANTENNA

Steering column support, behind fuse block ..

Page-Figure

30-1


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or "Start," voltage is available to power theRADIO. Voltage is applied at all timesthrough FUSE I to the POWERANTENNASWITCH.

When the switch is pressed to "Dn,"

current flows from POWER ANTENNASWITCH terminals I to T, the DKBLU/RED wire, the POWER ANTENNAMOTOR,the LT BLU/WHT wire, POWERANTENNA SWITCH terminal U to caseground.

When the switch is pressed to "Up,"current flows from the POWER ANTENNASWITCH terminals V to U, the LTBLU/WHT wire, the POWER ANTENNA

MOTOR, the DK BLU/RED wire, POWERANTENNA SWITCH terminal T to caseground.

TROUBLESHOOTING

IF ANTENNA DOES NOT RAISE ORLOWER

Check FUSE I. Check case ground on POWER AN-

TENNA SWITCH.

Check POWER ANTENNA MOTOR.IF RADIO DOES NOT WORK:

Check that G3 is clean and tight. Check for voltage at LT BLU/BLK wire

of RADIO.

Hi/T,o Beam Switch .Fuse Block .Hazard Switch

(With Carburetor) .(With Fuel Injection)

Ignition Switch .Light Switch .Power Antenna Motor .Power Antenna Switch .C18 (12 cavities) .C19 (1 cavity) .

C20 (8 cavities) ..C31 (5 cavities) .C32 (7 cavities) .C35 (8 cavities) ..

C36 (8 cavities) ..G3 .

Upper LH side of steering column .Under LH side of dash panel .

31-16-1

Middle of dash panel .Center console, RH side

Lower RH side of steering column .Dash panel, to left of fuel gauge .Behind LH rear wheel well .Center console, below radio .Under dash panel at base of steering columnUnder dash panel, base of steering

column support .Behind instrument cluster .Below dash panel, behind ignition switch .Behind center of dash panel .Behind center console, near heater fan

Behind center console, near heater fan .Attached under dash panel, above

ignition switch .

55-1

18-5,31-331-3,37-1

52-355-235-1

30-131-118-555-158-1

58-1

18-5

Figure 1 - Behind Center of Dash . WithCarburetor (Fuel Injection Similar)

Figure 2 - In Back of Center Console

FIAT SPIDEll 55

WINDSHIELD WIPER/WASHERS

H OT IN S TA RT O R R UN S E E P O W E R O IS T R IB U T lO N


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WI NO S HI El DWI PER/WASH E RSWITCHA S SE M B L Y

1 G RN / 1 W H T

BlK Bl K

1 Y EL

. 8 G R Y /'BL K ,

1 YEl

Cl l

. 8 P N K/

BL K 1 L T B LU /W H T

WINDSHielD Cl 2

WASH ER 2 4PUM P

1 Y EL

1 L T B LU /W H T

. 8 B L K/VIO

1 G R Y / B lK

1 G RY / Bl KGRY/BlK

1 IT B lU /B lK

C33

3

G R O U N D S

1 L T B LU /W H T

HT

1 RED B lU

fiO l'iA 1 ,PIn!'f1

S E E G R O U ND S

PAGES

CIRCUIT OPERATION

Voltage is applied at all times to the

COMPONENT LOCATION

Fuse Block .

POWER WINDOWS

Under LH side of dash panel .

Page-Figure

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POWER WINDOWRELAY contacts. Withthe IGNITION SWITCH in "Start" or"Run," current flows through the POWERWINDOWRELAY coil to ground G3. Therelay contacts close and power is available

to operate the POWER WINDOW MO-TORS

When the RH POWER WINDOWSWITCHis placed in "Down," current flowsthrough FUSE N, terminals U andD oftheswitch, the motor, and terminals Land H ofthe power window switch to ground G3.When the windowswitch is placed in "Up,"current flows through FUSE N,terminals Tand L of the switch, the motor, andterminal D to ground. Current flow issimilar for the LH POWER WINDOWSWITCH.

TROUBLESHOOTING

IF NEITHER POWER WINDOW WORKS:

With IGNITION SWITCH in "Start" or"Run," check for 12 volts at FUSE N.

Check that ground G3 is clean and tight. Check that. C17, C35 and C36 are tight.

IF ONE POWER WINDOW DOES NOTWORK:

Check the fuse for that window. Check the POWER WINDOW MOTOR

connector. Check the POWER WINDOW MOTOR

circuit breakers.

Power Window Motors .Power Window Relay .Power Window Switches .Seatbelt Timer .C17 (4 cavities) .

C35 (8 cavities) .C36 (8 cavities) .C46 (1 cavity) .C47 (1 cavity) .C48 (1 cavity) .C49 (1 cavity) .G3 .

Inside front of doorsAttached to relay panel .Center console, on both sides of radio .Mounted on RH side of relay panel .Under dash panel, base of steering

column support .Behind center console, near heater fan .Behind center console, near heater fan .Inside LH door, near lower hinge .Inside LH door, near lower hinge .Inside RH door, near lower hinge .Inside RH door, near lower hinge .Attached under dash panel, above

ignition switch .

7-1,18-157-1

7-1

36-158-158-157-257-252-252-2

18-5

Figure 1 - Window Switches(Disconnected From Mountson Either Side of Radio)

Figure 2 - Inside Front of LH Door

FIAT SPIDER 57

HEATER

H OT IN S TA RT O R R UN S E E P O W E R O I ST R IB U T IO NCOMPONENT LOCATIONFuse Block .Heater Fan Motor

Under LH side of dash panel .Under dash panel behind center console

Page-Figure

6-158 1


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1 B RN

,1 YELlB lK ,

1 B l K

I":"n .

Heater Fan Motor .Heater Fan Switch .CI6 (5 cavities) .C34 (3 cavities) .G6 .

Under dash panel, behind center console .,.In front of vent controls .Under LH side of dash panel, above relay panelBehind center console, near heater fanLH rear of heater fan motor casing

58-131-258-258-1

CIRCUIT OPERATIONWith the IGNITION'SWITCH in "Start"

or "Run," voltage is applied through FUSEB to the HEATER FAN SWITCH. When theHEATER FAN SWITCH is placed in "Lo,"current flows through terminals B and A ofthe switch, and the HEATER FAN MOTOR(including the resistor) to G6. In "Hi,"current flows directly through the motor to

G6.

Figure 1 - Behind Center Console

TROUBLESHOOTINGNO HEATER FAN OPERATION:

Check FUSE B by operating windshieldwipers.

Check that ground G6 is clean and tight. Check for voltage at C34.

J


11111111 l l l l l l l l l l ~ m i l [ I ~ 1111111111111111111


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Spider 2000 Elec Diag Manual 80 81

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