WIRING DIAGRAMS DESCRIPTION J 1T - 73-87ChevyTrucks...1. The system is grounded at the bus bar...
Transcript of WIRING DIAGRAMS DESCRIPTION J 1T - 73-87ChevyTrucks...1. The system is grounded at the bus bar...
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I I I I I I I I I I
1
WIRING DIAGRAMS
All diagrams contained in this manual are based on the latest product information available at the time of publication approval. The right is reserved to make changes at any time without notice.
SUBJECT PAGE
Description • • • III III III • III III III III III III III III III III III III • • • • III • • • • • III III III • • • • III • • • III III III • • III III Iii III, .. III III III • III III III • III III III III III III III III III III III III III • III III III • III III III III III III III III 2 Tracing Circuits on the New Diagrams ••••••• ~ . • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • . . . • . . . . . . • • •• 2 Basic Electric Circuits . • • • . . • • • • • • • • • • • • • . . • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • . • • • • • •• 4
Diagnostic Tools .......................................................".... • • • • . • . . • • • • . • • ". • • •. 9 Wire Size Conversion Table •••••••••••••••••••••••.•••••••••••••••••••••••••••••••••••••••••••• 11
On-Vehicle Service ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 12 Circuit Maintenance and Repair ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 12 Weather Pack Connectors •••••••••••.••••••••••••••••••.••••••••••.••••••••.••••••••••.••..•••• 12 Metrl.Pack Connectors .••••••••••••••.•...•••••••••••••.•...••••...••.••••••••••••••••••••..••. 14 WIring Repair ••••••••••••••••••••••.••.••••••••••••••••••••••.•••••••••••••..•..•.•...•...••• 14
Special Tools •••••..•••••..••••••••••••.•..••••••••••••••.•••.••.•••••••••.•...•...•••.•••.••.. 16
VEHICLE
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WIRING DIAGRAMS 2
DESCRIPTION
9A 89 0.5 8RN
WIRE J CIRCUIT NUM8ER
1T WIRE SiZE IN SQ. MM.
* lOCATION OF
OTHER END
("ADDRESS")
NOTE: IF THE OTHER END IS ON A DIFFERENT PAGE, THE PAGE NUMBER AND "ADDRESS" WILL BE SHOWN.
I COLOR oFWIRE INSULATION
BlK •.•.•••••. Black 8RN •...••..• Brown CHK ....•..•. Check CR ••.•.•••.•. Cross GRN •.••••••• Green NAT •••••••• Natural SGl .....•••• Single ORN •....... Orange GR .....••..•.. Gray
PPl ••••••••• Purple TR ••.•.•••••• Tracer VEL ••••••••. Yellow II ....•.•.... Parallel WHT ••••••••• White 8lU ••••••••••• Blue STR ••••••...• Stripe PNK ••••.••.••• Pink DK .•....••.••• Dark
8-07595
Figure 1-Wire Coding
The wiring diagrams in this manual use a format which reduces the number of lines on a schematic by'showing each wire connection at the terminals and components, but only one wire for the wiring harness.
The wiring diagrams use an alpha-numerical grid and an address for each wire entering the harness to show where it comes out. If the other end of the wire is on a different page, the page number and address will be shown at the bottom right hand corner of the schematic. Figure 1 explains the wire coding. The contents page lists the harnesses by section number and name.
TRACING CIRCUITS
EXAMPLE: CRUISE CONTROL POWER SOURCE WITH THE MANUAL TRANSMISSION (Figure 2)
1. Circuit 139 originates at the fuse block. Refer to figure 3.
2. This format gives the address code for the next connection: the address code is N9 (part of 139A N9 0.8 PNKl8lK).
3. At location N9. the triangle with the dot in the center indicates a splice in the harness. The three wire codes indicate the "addresses" of the three wires spliced together there. 04 is wire 139A. from the fuse block.
4. Wire 1398 is "addressed" to F4. F4 is located at the cruise control activator connector. It is the 0.8 PNKl8lK wire. The code at this location refers back to the splice at N9.
5. Wire 139C at this splice is "addressed" to R4. At location code R4, wire 139C is the 0.8 PNKlBLK wire to terminal C of the speed sensor connector. The "address" at this location refers back to the splice at N9.
6. The single vertical line (location of D9 through R9) represents the wirihg harness. The three points labeled 6 indicate where wire 139 enters (or leaves) the harness.
CRUISE CONTROL GROUND CIRCUITS (Figure 4) 1. The system is grounded at the bus bar ground. The
ground wire is coded 1508 19 0.8 8lK. This indicates that 1508 is a black wire and the next address is 19.
. 2. This is where the ground wire enters the harness.
3. There is a· splice in the harness at 19. This is indicated by the triangle with the dot in the center. It has four wire codes, indicating that four wires are spliced there: 150A. 1508, 150C and 1500.
4. At location M13, wire 150A connects to pin C of the six terminal connector.
5. 150A at location M13 mates to wire 150E, which is addressed J13.
6. At location J13, circuit 150E is the ground wire from pin C of the servo connector.
7. Wire 1508 is located at P4 (the bus bar) and is then "addressed" to splice 3 at location 19.
8. Wire 150C at splice 3 is addressed R4. location R4 shows 150C in cavity 8 of the speed sensor connector.
9. Wire 1500 at splice 3 is addressed H4. Location H4 showns 150D in the cruise module connector.
10. The electronic module ground and speed sensor ground enter the cruise control harness at this location.
11. The servo ground enters and leaves the servo harness at this location.
12. This is where the servo ground enters the cruise control main harness.
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