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

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

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

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-secondary

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

--

--

Not Used

B9

PNK

339

Fused ignition 1

B10

YEL/BLK

68

Low coolant indicator lamp output

B11-B12

--

--

Not Used

C1-C5

--

--

Not Used

C8

--

--

Not Used

C9

PNK

339

Fused ignition 1 feed

C10

DK BLU

473

Engine coolant fan 2 (LH) relay output-coil

C11

BLK

1050

Ground

C12

--

--

Not Used

D1-D4

--

--

Not Used

D5

BLK/WHT

451

PCM ground

D8

--

--

Not Used

D9

PNK

339

Fused ignition 1 feed

D10

YEL

772

Transaxle range switch input B

D11

PNK

439

Fused ignition 1 feed

D12

TAN

31

Oil pressure indicator lamp output

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

GRY

773

Transaxle range switch input C

E7-E11

--

--

Not Used

E12

--

--

Not Used

F1

--

--

Not Used

F2

GRY

532

Engine coolant fan 1 (RH) motor output

F3

DK GRN

335

Coolant fan 1 relay output-coil

F4

WHT

776

Transaxle range switch parity input

F5

BRN

25

Charge indicator lamp

F6

WHT

121

Tachometer signal

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

DK GRN

135

Engine coolant temperature sensor

F11

LT BLU

409

Engine coolant fan 2 (LH) feed

F12

BLK/WHT

771

Transaxle range switch input A

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-A3

--

--

Not Used

A4

WHT

776

Transaxle range switch parity input

A5

BRN

25

Charge indicator lamp

A6

WHT

121

Tachometer signal

A7-A9

--

--

Not Used

A10

DK GRN

135

Engine coolant temperature sensor

A11

--

--

Not Used

A12

BLK/WHT

771

Transaxle range switch input A

B1-B4

--

--

Not Used

B5

GRY

120

Fuel pump motor feed

B6

GRY

773

Transaxle range switch input C

B7-B9

--

--

Not Used

B10

YEL

772

Transaxle range switch input B

B11-B12

--

--

Not Used

C1-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

ORN

1340

Fused battery feed

D2-D3

--

--

Not Used

D4

LT GRN

275

Transaxle range switch feed-PARK

D5

PNK

1339

Fused ignition 1 feed

D8

DK GRN

389

Vehicle speed signal

D9

--

--

Not Used

D10

YEL/BLK

68

Low coolant warning indicator lamp output

D11

TAN

31

Oil pressure indicator lamp output

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

YEL

18

Tail/turn/stop lamp feed-left rear

E12

--

--

Not Used

F1-F3

--

--

Not Used

F4

LT GRN

11

High beam headlamp feed

F5

PPL

34

Fog lamp feed

F6

--

--

Not Used

F7

ORN

640

Fused battery 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

DK GRN

19

Tail/stop/stop lamp 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

A!-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

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

DK GRN

19

Tail/turn stop lamp 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

--

--

Not Used

C1-C5

--

--

Not Used

C8-C10

--

--

Not Used

C11

BRN

9

Park lamp feed

C12

--

--

Not Used

D1-D5

--

--

Not Used

D8D10

--

--

Not Used

D11

BRN

9

Park lamp feed

D12

--

--

Not Used

E1-E10

--

--

Not Used

E11

YEL

18

Tail/turn/stop lamp feed-left rear

E12

--

--

Not Used

F1-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