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 Fuse 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

Underhood Fuse Block C1


Object Number: 73172  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

ORN

57

Left Cornering Lamp Supply Voltage (T87)

A2

RED

78

Air Injection Reaction Pump Motor Feed

A3

BRN

41

Ignition 3 Voltage (UB7)

A4

BRN/WHT

309

Park Lamp Feed - Right

A5

RED

228

Windshield Washer Pump Control

A6

--

--

Not Used

A7

GRY

532

Coolant Fan Motor Feed - Secondary

A8

BLK

58

Right Cornering Lamp Supply Voltage (T87)

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

LT BLU

14

Turn Signal Lamp Feed - Left Front

B6

LT BLU

14

Turn Signal Lamp Feed - Left Front

B7

PPL

709

Park Lamp Feed - Right

B8

PPL

709

Park Lamp Feed - Right

B9

DK BLU

15

Turn Signal Lamp Feed - Right Front

B10 - B12

--

--

Not Used

C1 - C4

--

--

Not Used

C5

TAN/WHT

312

Low Beam Headlamp Feed - Right

C8

BLK

250

Ground

C9

DK BLU

15

Turn Signal Lamp Feed - Right Front

C10 - C11

--

--

Not Used

C12

LT GRN

1478

Low Coolant Sensor Signal

D1 - D9

--

--

Not Used

D10

WHT

504

Coolant Fan Motor Output

D11 - D12

--

--

Not Used

E1 - E4

--

--

Not Used

E5

YEL

712

Low Beam Headlamp Feed - Left

E6 - E9

--

--

Not Used

E10

LT BLU

409

Coolant Fan Motor Feed

E11 - E12

--

--

Not Used

F1 - 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 (GRY)

Pin

Wire Color

Circuit No.

Function

A1

BRN

241

Fuse Output - Ignition 3

A2

--

--

Not Used

A3

BRN

41

Fuse Output - Ignition 3

A4- 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

ORN

57

Cornering Lamp Feed - Left

C2

BLK/WHT

1969

High Beam Headlamp Relay Output - Coil

C3

YEL

43

Fuse Output - Accessory

C4-C5

--

--

Not Used

C8

PNK

639

Fuse Output - Ignition 1

C9- C12

--

--

Not Used

D1

DK GRN

1483

Control Power Output

D2

BRN

4

Ignition Switch Output-Accessory

D3

--

--

Not Used

D4

PNK/WHT

1970

Low Beam Headlamp Relay Output - Coil

D5

ORN

440

Fuse Output - Battery

D8- D9

--

--

Not Used

D10

BLK

28

Horn Relay Output - Coil

D11

LT GRN

1478

Low Coolant Sensor Signal

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

--

--

Not Used

E12

ORN

3540

Fuse Output - Battery (Uplevel)

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- F7

--

--

Not Used

F8

BLK

58

Cornering Lamp Feed - Right

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

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

--

--

Not Used

B1- B2

--

--

Not Used

B3

PNK

139

Fuse Output - Ignition 1

B4

PNK

139

Fuse Output - Ignition 1

B5

--

--

Not Used

B6

PNK

239

Fuse Output - Ignition 1

B7- B8

--

--

Not Used

B9

PNK

239

Fuse Output - Ignition 1

B10

DK BLU

473

Coolant Fan Relay Output - Coil Secondary

B11- B12

--

--

Not Used

C1

--

--

Not Used

C2

YEL

447

Starter Relay Output - Coil

C3

PPL

6

Starter Solenoid Feed

C4- C8

--

--

Not Used

C9

PNK

539

Fuse Output - Ignition 1

C10

--

--

Not Used

C11

DK GRN

59

Air Conditioning Compressor Clutch Solenoid Feed

C12

--

--

Not Used

D1- D3

--

--

Not Used

D4

PNK

339

Fuse Output - Ignition 1

D5

ORN

240

Fuse Output - Battery

D8

PNK

839

Fuse Output - Ignition 1

D9

PNK

539

Fuse Output - Ignition 1

D10- D12

--

--

Not Used

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 Fuse Block, C4


Object Number: 280790  Size: CH

Connector Part Information

    • 12160605
    • 2 Way F MaxiFuse®

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RED

1242

Fuse Output - Battery

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 (GRY)

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

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

440

Fuse Output - Battery

E10

ORN

540

Fuse Output - Battery

E11

--

--

Not Used

E12

ORN

3740

Fuse Output - Battery

F1

DK GRN/WHT

465

Fuel Pump Relay Feed - Coil

F2

GRY

120

Fuel Pump Motor Feed

F3

WHT

1080

Park Lamp Relay Output - Coil

F4

--

--

Not Used

F5

ORN

840

Fuse Output - Battery

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 (BRN)

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

GRY/BLK

690

Courtesy Lamp Relay Output - Coil

B1-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-D1

--

--

Not Used

D2

PNK

3

Ignition Switch Output - Ignition 1

D3-D8

--

--

Not Used

D9

PNK

79

Fuel Door Release Solenoid Feed

D10

BRN

253

Trunk Release Relay Feed - Coil

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

1039

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-A10

--

--

Not Used

A11

ORN

300

Ignition Switch Output - Ignition 3

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-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