GM Service Manual Online
For 1990-2009 cars only
Table 1: Underhood Fuse Block C1
Table 2: Underhood Fuse Block C2
Table 3: Underhood Fuse Block C3
Table 4: Underhood Junction Block C4
Table 5: Accessory Power Receptacle (Front)
Table 6: Accessory Power Receptacle (Rear)
Table 7: Cigar Lighter
Table 8: Rear Fuse Block, C1
Table 9: Rear Fuse Block, C2
Table 10: Rear Fuse Block, C3
Table 11: Rear Fuse Block C4

Underhood Fuse Block C1


Object Number: 73172  Size: CH

Connector Part Information

    • 15319528
    •  68 Way M Micro - Pack 100 Series (LT GRY)

Pin

Wire Color

Circuit No.

Function

A1-A4

--

--

Not Used

A5

RED

228

Windshield Washer Pump Motor Feed

A6

--

--

Not Used

A7

GRY

532

Coolant Fan Motor Feed - Secondary

A8

--

--

Not Used

A9

PNK

1200

Headlamp Lamp Output - High Beam

A10 - A11

--

--

Not Used

A12

DK GRN

29

Horn Feed

B1

BLK/WHT

99

Windshield Washer Fluid Level Sensor Signal

B2 - B3

--

--

Not Used

B4

BRN/WHT

309

Park Lamp Feed- Right

B5

--

--

Not Used

B6

LT BLU/BLK

14

Turn Signal Lamp Feed-Left Front

B7

PPL

709

Park Lamp Feed - Right

B8

--

--

Not Used

B9

DK BLU

15

Turn Signal Lamp Feed - Right Front

B10 - C4

--

--

Not Used

C5

TAN/WHT

312

Low Beam Headlamp Feed - Right

C8

BLK

250

Ground

C9

--

--

Not Used

C10

PPL

34

Fog Lamp Feed

C11

PPL/WHT

34

Fog Lamp Feed

C12- D9

--

--

Not Used

D10

WHT

504

Coolant Fan Motor Output

D11 - E4

--

--

Not Used

E5

YEL

712

Low Beam Headlamp Feed - Left

E6 - E9

--

--

Not Used

E10

LT BLU

409

Coolant Fan Motor Feed

E11 - F5

--

--

Not Used

F6

LT GRN/BLK

311

High Beam Headlamp Feed - Right

F7

DK GRN/WHT

711

High Beam Headlamp Feed - Left

F8 - F10

--

--

Not Used

F11

BLK

250

Ground

F12

--

--

Not Used

Underhood Fuse Block C2


Object Number: 73168  Size: CH

Connector Part Information

    • 15319530
    • 68 Way F Metri-Pack 280 Series (DK GRY)

Pin

Wire Color

Circuit No.

Function

A1

BRN

241

Fuse Output - Ignition 3

A2- A12

--

--

Not Used

B1

BLK/WHT

99

Windshield Washer Fluid Level Sensor Signal

B2- B4

--

--

Not Used

B5

BRN/WHT

309

Park Lamp Feed - Right

B6

ORN

240

Fuse Output - Battery

B7- B9

--

--

Not Used

B10

LT GRN/ BLK

592

Daytime Running Lamp Relay Output - Coil

B11

--

--

Not Used

B12

ORN

2040

Fuse Output - Battery

C1

--

--

Not Used

C2

BLK/WHT

1969

High Beam Headlamp Relay Output - Coil

C3-C5

--

--

Not Used

C8

PNK

639

Fuse Output - Ignition 1

C9- C10

--

--

Not Used

C11

DK GRN/WHT

1317

Fog Lamp Relay Output-Coil

C12

--

--

Not Used

D1

DK GRN

1483

Control Power Output

D2

BRN

4

Ignition Output-Accessory

D3

--

--

Not Used

D4

PNK/WHT

1970

Low Beam Headlamp Relay Output - Coil

D5- D9

--

--

Not Used

D10

BLK

28

Horn Relay Output - Coil

D11

--

--

Not Used

D12

PNK

70

Delayed Accessory Bus Relay Output - Ignition 3

E1- E5

--

--

Not Used

E6

LT BLU

14

Turn Signal Lamp Feed - Left Front

E7

PPL

709

Park Lamp Feed - Left

E8- E9

--

--

Not Used

E10

PNK

3

Ignition Switch Output - Ignition 1

E11

PPL

34

Fog Lamp Feed

E12

ORN

3540

Fuse Output - Battery

F1

--

--

Not Used

F2

YEL

43

Fuse Output - Accessory

F3

YEL

143

Fuse Output - Accessory

F4

--

--

Not Used

F5

RED

228

Windshield Washer Pump Motor Feed

F6- F8

--

--

Not Used

F9

DK BLU

15

Turn Signal Lamp Feed - Right Front

F10- F12

--

--

Not Used

Underhood Fuse Block C3


Object Number: 73167  Size: CH

Connector Part Information

    • 15319529
    • 68 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A1- A3

--

--

Not Used

A4

PNK

139

Fuse Output - Ignition 1 (w/NC8)

A5

--

--

Not Used

A6

PNK/BLK

239

Fuse Output - Ignition 1

A7

--

--

Not Used

A8

PNK

339

Fuse Output - Ignition 1

A9- A10

--

--

Not Used

A11

DK GRN/ WHT

459

Air Conditioning Compressor Control Relay Output - Coil

A12- B2

--

--

Not Used

B3

PNK

139

Fuse Output - Ignition 1

B4

PNK/BLK

139

Fuse Output - Ignition 1

B5

--

--

Not Used

B6

PNK

239

Fuse Output - Ignition 1

B7- B8

--

--

Not Used

B9

PNK/BLK

239

Fuse Output - Ignition 1

B10

DK BLU

473

Coolant Fan Relay Output - Coil Secondary

B11- C1

--

--

Not Used

C2

YEL

447

Starter Relay Output - Coil

C3

PPL

6

Starter Solenoid Feed

C4

PNK/WHT

139

Fuse Output - Ignition 1 (w/L67)

C5- C8

--

--

Not Used

C9

PNK

539

Fuse Output - Ignition 1

C10

--

--

Not Used

C11

DK GRN

59

Air Conditioning Compressor Clutch Solenoid Feed

C12- D3

--

--

Not Used

D4

PNK/BLK

339

Fuse Output - Ignition 1

D5

ORN

240

Fuse Output - Battery

D8

PNK/BLK

839

Fuse Output - Ignition 1

D9

PNK/WHT

539

Fuse Output - Ignition 1

D10- E1

--

--

Not Used

E2

RED

78

Air Injection Reaction Pump Motor Feed (w/NC8)

E3

BRN

436

Air Injection Reaction Pump Motor Feed (w/NC8)

E4

PNK

339

Fuse Output - Ignition 1

E5- E6

--

--

Not Used

E7

PNK

739

Fuse Output - Ignition 1

E8- E12

--

--

Not Used

F1

BRN

241

Fuse Output - Ignition 3

F2- F7

--

--

Not Used

F8

DK GRN

335

Coolant Fan Relay Output - Coil

F9

PNK

39

Fuse Output - Ignition 1

F10- F12

--

--

Not Used

Underhood Junction Block C4


Object Number: 258627  Size: CH

Connector Part Information

    • 15319799
    • 2 Way (GRN)

Pin

Wire Color

Circuit No.

Function

A

RED

742

Battery Positive Voltage (B+)

B

RED/WHT

842

Battery Positive Voltage (B+)

Accessory Power Receptacle (Front)


Object Number: 258167  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

ORN

3540

Fused Battery Output

B

BLK

650

Ground

Accessory Power Receptacle (Rear)


Object Number: 258167  Size: CH

Connector Part Information

    • 12033934
    • 2 Way F 56 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN

3540

Fused Battery Output

B

BLK

650

Ground

Cigar Lighter


Object Number: 68737  Size: CH

Connector Part Information

    • 12126489
    • 3 Way F Metri - Pack 280 Series Flex Lock (NAT)

Pin

Wire Color

Circuit No.

Function

A

ORN

2040

Fused Output - Battery - Type III Fuse

B

YEL

1491

Dash Intergration Module Output - Backlighting Lamps

C

BLK

450

Ground

Rear Fuse Block, C1


Object Number: 280787  Size: CH

Connector Part Information

    • 15303512
    • 68 Way Metri-pack 280 Series (LT GRA)

Pin

Wire Color

Circuit No.

Function

A1

ORN

1340

Fuse Output - Battery

A2

--

--

Not Used

A3

BRN/WHT

309

Park Lamp Feed - Right

A4

YEL

32

Fuse Output - Instrument Panel Lamps

A5-A8

--

--

Not Used

A9

ORN

440

Fuse Output-Battery-Type III Fuse

A10

BRN

141

Fuse Output - Ignition 3

A11

ORN

300

Ignition Switch Output - Ignition 3

A12-B1

--

--

Not Used

B2

YEL

1139

Fuse Output - Ignition 1

B3

BRN/WHT

309

Park Lamp Feed - Right

B4

PPL

709

Park Lamp Feed - Left

B5

PNK/BLK

1615

Park Relay Output - Coil

B6

LT GRN

275

Transmission Mounted Neutral Safety Switch Output - Park

B7

LT BLU

2182

Reverse Lamp Relay Output - Coil

B8

LT GRN

24

Backup Lamp Feed

B9-C4

--

--

Not Used

C5

ORN

1640

Fuse Output - Battery

C8

LT GRN

24

Backup Lamp Feed

C9

ORN

540

Fuse Output - Battery

C10

--

--

Not Used

C11

BRN

41

Fuse Output - Ignition 3

C12

BRN

241

Fuse Output - Ignition 3

D1

--

--

Not Used

D2

BLK

750

Ground

D3

--

--

Not Used

D4

DK GRN

1483

Control Power Output

D5-D8

--

--

Not Used

D9

PNK

70

Delayed Accessory Bus Relay Output - Common Contact - Ignition 3

D10

DK GRN

1399

Delayed Accessory Bus Relay Feed - Coil - Ignition 3 Relay

D11-E2

--

--

Not Used

E3

ORN

840

Fuse Output - Battery

E4

PPL

709

Park Lamp Feed - Left

E5-E8

--

--

Not Used

E9

ORN

540

Fuse Output - Battery

E10

ORN

540

Fuse Output - Battery

E11

--

--

Not Used

E12

ORN

3740

Fuse Output - Battery

F1

GRN DK/WHT

465

Fuel Pump Relay Feed-Coil

F2

GRY

120

Fuel Motor Pump Feed (L36)

F2

RED

458

Fuel Pump Relay Output-N.O. Contact (L67)

F3

WHT

1080

Park Lamp Relay Output-Coil

F4

--

--

Not Used

F5

ORN

840

Fuse Output-Battery-Type III Fuse

F6-F11

--

--

Not Used

F12

ORN

3740

Fuse Output - Battery

Rear Fuse Block, C2


Object Number: 280786  Size: CH

Connector Part Information

    • 15303514
    • 68 Way Metri-pack 280 Series (DK GRY)

Pin

Wire Color

Circuit No.

Function

A1-A5

--

--

Not Used

A6

DK BLU

75

Delayed Accessory Bus Relay Output - Common Contact - Accessory

A7-A8

--

--

Not Used

A9

BLK/WHT

56

Trunk Release Motor Feed

A10

ORN

3640

Fuse Output - Battery

A11

BLK

750

Ground

A12-B12

--

--

Not Used

C1

ORN

3640

Fuse Output - Battery

C2-C3

--

--

Not Used

C4

ORN

2440

Fuse Output - Battery

C5

ORN

2240

Fuse Output - Battery

C8

--

--

Not Used

C9

LT BLU

1344

Trunk Release Relay Output - Coil

C10-D8

--

--

Not Used

D9

PNK

79

Fuel Door Release Solenoid Feed

D10-D11

--

--

Not Used

D12

DK BLU/WHT

149

Courtesy Lamp Feed

E1

ORN

2840

Fuse Output - Battery

E2

PNK

3

Ignition Switch Output - Ignition 1

E3-E10

--

--

Not Used

E11

TAN

2183

Inadvertent Power Relay Output - Coil

E12

DK BLU/WHT

149

Courtesy Lamp Feed

F1-F2

--

--

Not Used

F3

PNK

1239

Fuse Output - Ignition 1

F4-F8

--

--

Not Used

F9

WHT

93

Fuel Door Release Relay Output - Coil

F10-F12

--

--

Not Used

Rear Fuse Block, C3


Object Number: 280784  Size: CH

Connector Part Information

    • 15203513
    • 68 Way F Metri-pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A1-A6

--

--

Not Used

A7

ORN

740

Fuse Output - Battery

A8-A11

--

--

Not Used

A12

--

--

Not Used

B1

ORN

640

Fuse Output - Battery

B2-B9

--

--

Not Used

B10

RED

1342

Fuse Output - Battery

B11

--

--

Not Used

B12

ORN

3340

Fuse Output - Battery

C1

--

--

Not Used

C2

ORN

1040

Fuse Output - Battery

C3

--

--

Not Used

C4

WHT

193

Rear Defogger Relay Output - Coil

C5

PPL

293

Rear Defogger Element Feed

C8-C9

--

--

Not Used

C10

YEL

321

Electronic Level Control Relay Output - Coil

C11

DK GRN

322

Electronic Level Control Compressor Motor Feed

C12

--

--

Not Used

D1

ORN

2640

Fuse Output - Battery

D2

ORN

1040

Fuse Output - Battery

D3

PNK

1039

Fuse Output - Ignition 1

D4

WHT

193

Rear Defogger Relay Output-Coil

D5-D11

--

--

Not Used

D12

ORN

1140

Fuse Output - Battery

E1

--

--

Not Used

E2

ORN

1040

Fuse Output - Battery

E3

PNK

1039

Fuse Output - Ignition 1

E4-E6

--

--

Not Used

E7

TAN

2186

Fuel Door Lock Relay Feed

E8-E10

--

--

Not Used

E11

ORN

3340

Fuse Output - Battery

E12-F1

--

--

Not Used

F2

ORN

1040

Fuse Output - Battery

F3-F5

--

--

Not Used

F6

BLK

755

Delayed Accessory Bus Relay Output - Coil - Accessory Relay

F7

LT GRN

2187

Fuel Door Lock Relay Output - Coil

F8

--

--

Not Used

F9

ORN

2540

Fuse Output - Battery

F10-F11

--

--

Not Used

F12

ORN

1740

Fuse Output - Battery

Rear Fuse Block C4


Object Number: 280790  Size: CH

Connector Part Information

    • 12160605
    • 2 Way F (GRN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RED

1242

Fuse Output - Battery