GM Service Manual Online
For 1990-2009 cars only
Table 1: AIR Relay
Table 2: Cigar Lighter Connector
Table 3: Crank Relay
Table 4: Front Electric Accessory Plug Housing
Table 5: Rear Electric Accessory Plug Housing
Table 6: Relay Center 1
Table 7: Relay Center 2
Table 8: Underhood Accessory Wiring Junction Block C1
Table 9: Underhood Accessory Wiring Junction Block C2
Table 10: Underhood Accessory Wiring Junction Block C3
Table 11: Underhood Accessory Wiring Junction Block C4
Table 12: Underhood Accessory Wiring Junction Block C5
Table 13: Underhood Accessory Wiring Junction Block C6

AIR Relay


Object Number: 535912  Size: CH

Connector Part Information

    • 12129716
    • 4 F Metri Pack 280 FLX LK (GRY)

Pin

Wire Color

Circuit No.

Function

30

ORN

3040

Fused Output

85

BLK

339

Fused Output Ignition 1

86

BRN

436

AIR Injection Reaction Pump Motor Relay Output - Coil

87

RED

78

AIR Injection Reaction Pump Motor Feed

Cigar Lighter Connector


Object Number: 38228  Size: CH

Connector Part Information

    • 12047699
    • 1 M Sleeve & 1 C/LTR P2S (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN

440

Fused ignition feed

B

BLK

1450

Ground

Crank Relay


Object Number: 535919  Size: CH

Connector Part Information

    • 12110539
    • 5 F Metri Pack 280 FLX LK(BLK)

Pin

Wire Color

Circuit No.

Function

30

RED

402

Fused Output

85

ORN/BLK

1786

Transmission Park/Neutral Signal

86

YEL/BLK

625

Starter Enable Relay Output - Coil

87

PPL

6

Starter Solenoid Feed

87A

--

--

Not Used

Front Electric Accessory Plug Housing


Object Number: 258167  Size: CH

Connector Part Information

    • 12033934
    • 2-Way 56 Series Lock Type (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN

1940

Fused ignition feed

B

BLK

150

Ground

Rear Electric Accessory Plug Housing


Object Number: 258167  Size: CH

Connector Part Information

    • 12033934
    • 2-Way F 56 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN

2540

Fused ignition feed

B

BLK

850

Ground

Relay Center 1


Object Number: 73243  Size: CH

Connector Part Information

    • 12160504
    • 36-Way F Metri Pack 280 series Flex Lock (BLK)

Pin

Wire Color

Circuit No.

Function

A1- A9

--

--

Not Used

B1-B2

--

--

Not Used

B3

ORN

2240

Battery Fused Output

B4

--

--

Not Used

B5

PPL

293

Rear Defogger Feed

B6

--

--

Not Used

B7

BRN

241

Ignition 3 Fused Output

B8 - B9

--

--

Not Used

C1

BLK

707/ 707

Accessory Relay Coil Feed/ RAP Cluster Input

C2

--

--

Not Used

C3

RED

142

Battery Fused Output

C4

--

--

Not Used

C5

WHT

193

Rear Defogger Relay Coil Output

C6

--

--

Not Used

C7

ORN

1040

Battery Fused Output

C8 - D9

--

--

Not Used

Relay Center 2


Object Number: 73243  Size: CH

Connector Part Information

    • 12160504
    • 36-Way F Metri Pack 280 series Flex Lock (BLK)

Pin

Wire Color

Circuit No.

Function

A1 - A9

--

--

Not Used

B1

ORN

1640

Baterry Fused Output

B2

--

--

Not Used

B3

ORN

1640

Baterry Fused Output

B4 - B9

--

--

Not Used

C1

YEL

1870

Rear Fog Lamp Light Control Output

C2

--

--

Not Used

C3

RED

122

Rear Fog Lamp Feed

C4 - D9

--

--

Not Used

Underhood Accessory Wiring Junction Block C1


Object Number: 280784  Size: CH

Connector Part Information

    • 15303513
    • 68-Way F Metri-Pack 280 Series Flexlock (BLK)

Pin

Wire Color

Circuit No.

Function

A1-A4

--

--

Not Used

A5

DK GRN/WHT

465

Fuel Pump Relay Feed-Coil

A6-A7

--

--

Not Used

A8

ORN

840

Fused Battery Feed

A9

PNK

339

Fused Ignition 1 Feed

A10

WHT

504

Engine Coolant Fan 1 (RH) Motor Feed

A11

--

--

Not Used

A12

PNK

639

Fused Ignition 1 Feed

B1-B3

--

--

Not Used

B4

RED

490

Fuel Pump Relay Feed-N.C. Contact-Prime

B5

BLK/WHT

451

PCM Ground

B6

--

--

Not Used

B7

PNK

1339

Fused Ignition 1 Feed

B8-B9

--

--

Not Used

B9

PNK

339

Fused Ignition 1 Feed

B10

YEL/BLK

68

Low Coolant Indicator Lamp Output

B11-B12

--

--

Not Used

C1 - C9

--

--

Not Used

C10

DK BLU

473

Engine Coolant Fan 2 (LH) Relay Output-Coil

C11

BLK

1050

Ground

C12-D2

--

--

Not Used

D3

BRN

436

Air Injection Pump Motor Relay Coil Output

D4

--

--

Not Used

D5

BLK/WHT

451

PCM Ground

D8

--

--

Not Used

D9

PNK

339

Fused Ignition 1 Feed

D10

--

--

Not Used

D11

PNK

439

Fused Ignition 1 Feed

D12

TAN/BLK

231

Oil Pressure Switch Signal

E1

--

--

Not Used

E2

ORN

540

Fused Battery Feed

E3

--

--

Not Used

E4

LT GRN

275

Transaxle Range Switch Feed-PARK

E5

DK GRN

389

Vehicle Speed Signal

E6-E11

--

--

Not Used

E12

ORN

2740

Battery Fused Output

F1

--

--

Not Used

F2

BLK

532

Engine Coolant Fan 1 (RH) Motor Output

F3

DK GRN

335

Coolant Fan 1 Relay Output-Coil

F4

--

--

Not Used

F5

LT GRN

24

Back Up Lamp Feed

F6

WHT

17

Stoplamp Switch Output

F7

DK GRN/WHT

459

A/C CLU Relay Output Coil

F8

DK GRN

59

A/C Compressor Clutch Coil Solenoid Feed

F9

PNK

239

Fused Ignition 1 Feed

F10

--

--

Not Used

F11

LT BLU

409

Engine Coolant Fan 2 (LH) Feed

F12

--

--

Not Used

Underhood Accessory Wiring Junction Block C2


Object Number: 280786  Size: CH

Connector Part Information

    • 15303514
    • 68-Way F Metri-Pack 280 Series Flexlock (BRN)

Pin

Wire Color

Circuit No.

Function

A1-A4

--

--

Not Used

A5

BRN

25

Charge Indicator Lamp

A6

WHT

17

Stoplamp Switch Output

A7-B4

--

--

Not Used

B5

GRY

120

Fuel Pump Motor Feed

B6-C3

--

--

Not Used

C4

LT GRN

275

Transaxle Range Switch Feed-PARK

C5

--

--

Not Used

C8

DK GRN

389

Vehicle Speed Signal

C9

--

--

Not Used

C10

PNK

439

Fused Ignition 1 Feed

C11-C12

--

--

Not Used

D1-D3

--

--

Not Used

D4

LT GRN

275

Transaxle Range Switch Feed-PARK

D5

PNK

1339

Fused Ignition 1 Feed

D8 - D9

--

--

Not Used

D10

YEL/BLK

68

Low Coolant Warning Indicator Lamp Output

D11

TAN/BLK

231

Oil Pressure Switch Signal

D12

--

--

Not Used

E1

ORN

1340

Fused Battery Feed

E2-E4

--

--

Not Used

E5

YEL

317

Fog Lamp Relay Feed-Coil

E6

--

--

Not Used

E7

BLK

28

Horn Relay Output-Coil

E8

DK GRN

389

Vehicle Speed Signal

E9-E10

--

--

Not Used

E11

LT GRN/BLK

311/wT90

High Beam Headlamp Feed-Right

E11

YEL

18

Stop/Turnlamp Feed-Left Rear

E12-F3

--

--

Not Used

F4

DK GRN/WHT

711/wT90

High Beam Headlamp Feed

F4

LT GRN

11

High Beam Headlamp Feed

F5

PPL

34

Fog Lamp Feed

F6

--

--

Not Used

F7

ORN

640

Fused Battery Feed

F8

YEL

712/wT90

Low Beam Headlamp Feed

F8

TAN

12

Low Beam Headlamp Feed

F9

LT BLU

14

Turn Signal Lamp Feed-Left Front

F10

DK BLU

15

Turn Signal Lamp Feed-Right Front

F11

BRN

9

Park Lamp Feed

F12

TAN/WHT

312/wT90

Low Beam Headlamp Feed

F12

DK GRN

19

Stop/Turnlamp Feed-Right Rear

Underhood Accessory Wiring Junction Block C3


Object Number: 280787  Size: CH

Connector Part Information

    • 15303512
    • 68-Way F Metri-Pack 280 Series Flexlock (GRY)

Pin

Wire Color

Circuit No.

Function

A1-A3

--

--

Not Used

A4

LT GRN

11

High Beam Headlamp Feed

A5

PPL

34

Fog Lamp Feed

A6

--

--

Not Used

A7

DK GRN

29

Horn Feed

A8

YEL

712/wT90

Low Beam Headlamp Feed

A8

TAN

12

Low Beam Headlamp Feed

A9

LT BLU

14

Turn Signal Lamp Feed-Left Front

A10

DK BLU

15

Turn Signal Lamp Feed-Right Front

A11

BRN

9

Park Lamp Feed

A12

TAN/WHT

312

Low Beam Headlamp Feed-Right

A12

DK GRN

19

Stop/Turnlamp Feed-Right Rear

B1-B3

--

--

Not Used

B4

LT GRN

11

High Beam Headlamp Feed

B5

PPL

34

Fog Lamp Feed

B6

--

--

Not Used

B7

DK GRN

29

Horn Feed

B8

TAN

12

Low Beam Headlamp Feed

B9-B10

--

--

Not Used

B11

BRN

9

Park Lamp Feed

B12-C10

--

--

Not Used

C11

BRN

9

Park Lamp Feed

C12-D10

--

--

Not Used

D11

BRN

9

Park Lamp Feed

D12-E8

--

--

Not Used

E9

PNK

339

Ignition 1 Fused Output

E10

--

--

Not Used

E11

LT GRN/BLK

311/wT90

High Beam Headlight Feed

E11

YEL

18

Stop/Turnlamp Feed-Left Rear

E12-F12

--

--

Not Used

Underhood Accessory Wiring Junction Block C4


Object Number: 280788  Size: CH

Connector Part Information

    • 12146038
    • 2-Way F MaxiFuse (GRY)

Pin

Wire Color

Circuit No.

Function

A

RED

242

Fused Battery Feed

B

RED

142

Fused Battery Feed

Underhood Accessory Wiring Junction Block C5


Object Number: 258677  Size: CH

Connector Part Information

    • 12146037
    • 2-Way F MaxiFuse (BLK)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RED

42

Fused Battery Feed

Underhood Accessory Wiring Junction Block C6


Object Number: 280790  Size: CH

Connector Part Information

    • 12160605
    • 2-Way F MaxiFuse (GRN)

Pin

Wire Color

Circuit No.

Function

A

RED

642

Fused Battery Feed

B

RED

742

Fused Battery Feed