GM Service Manual Online
For 1990-2009 cars only
Table 1: Fuse Block-Underhood Label Usage
Table 2: Fuse Block - Underhood C1
Table 3: Fuse Block - Underhood C2
Table 4: Fuse Block - Underhood C3
Table 5: Fuse Block - Underhood C4
Table 6: Fuse Block - Rear Label Usage
Table 7: Fuse Block - Rear C1
Table 8: Fuse Block - Rear C2
Table 9: Fuse Block - Rear C3
Table 10: Fuse Block - Rear C4

Fuse Block-Underhood Label


Object Number: 477330  Size: MF

Fuse Block-Underhood Label Usage

 

No.

Fuse/Circuit Breaker

Rating

Description

1

--

--

Not Used

2

ACCY Fuse

15 A

Windshield Wiper Switch

3

WSW Fuse

30 A

Windshield Wiper Motor

4

--

--

Not Used

5

HDLOBML Fuse

10 A

Left Low Beam Headlamp

6

HDLOBMR Fuse

10 A

Right Low Beam Headlamp

7

Spare

10 A

--

8

PCM BATT Fuse

10 A

PCM and Theft Deterrent Control Module

9

HDHIBMR Fuse

10 A

Right High Beam Headlamp

10

HDHIBML Fuse

10 A

Left High Beam Headlamp

11

IGN 1 Fuse

10 A

AIR Pump Relay, EVAP Canister Purge Valve, MAF Sensor, Secondary AIR Injection Bypass Valve Solenoid, and TCC/Cruise Release Switch

12

--

--

Not Used

13

TRANS Fuse

10 A

Automatic Transaxle

14

CR CONT Fuse

10 A

Cruise Control Module and HVAC SOL Relay

15

DIS Fuse

20 A

Ignition Control Modules

16

INJR 2 Fuse

10 A

Fuel Injectors 1, 3, and 5

17

--

--

Not Used

18

--

--

Not Used

19

PCM IGN Fuse

10 A

START 1 Relay and PCM

20

OXY SEN Fuse

10 A

Oxygen Sensors

21

INJR 1 Fuse

10 A

Fuel Injectors 2, 4 and 6

22

AUX PWR Fuse

20 A

Auxiliary Power Outlet (Console)

23

C/LTR Fuse

20 A

Auxiliary Power Outlet (Overhead Console) and Cigar Lighter

24

FOG/DRL Fuse

15 A

DRL and FOG LP Relays

25

HORN Fuse

15 A

HORN Relay

26

AC CLU Fuse

15 A

A/C Clutch Relay

27

HDLP HI BM Relay

--

HDHIBML and HDHIBMR Fuses, DIM, and Headlamp Switch

28

HDLP LO BM Relay

--

HDLOBML and HDLOBMR Fuses, DIM, and Headlamp Switch

29

FOG LP Relay

--

DIM, Front Fog Lamps, and Ignition Switch

30

DRL Relay

--

DIM and Left High Beam Headlamp

31

HORN Relay

--

DIM, Horn, and Turn Signal/Multifunction Switch

32

A/C CLU Relay

--

A/C Compressor Clutch, DIM, Ignition Switch, and PCM

33

HVAC SOL Relay

--

DIM and A/C Orifice Solenoid

34

ACCY Relay

--

WSW and ACCY Fuses

35

AIR PUMP Relay (Buick/Pontiac w/NC8)

--

Secondary Air Injection (AIR) Pump

36

START 1 Relay

--

PCM and Starter Solenoid

37

COOLFAN 1 Relay

--

PCM and Right Cooling Fan

38

IGN 1 Relay

--

DIS, OXY SEN, IGN 1, INJ 1, INJ 2, TRANS, PCM IGN, and CR CONT Fuses, DIM, and Ignition Switch

39

COOLFAN S/P Relay

--

Cooling Fans and PCM

40

COOLFAN 2 Relay

--

Left Cooling Fan

41

START Circuit Breaker

30 A

START 1 Relay

42

AIR Fuse (Buick/Pontiac w/NC8)

30 A

AIR PUMP Relay

43

--

--

Not Used

44

ABS Fuse

50 A

EBCM

45

--

--

Not Used

46

COOL FAN 1 Fuse

30 A

COOLFAN 1 Relay

47

COOL FAN 2 Fuse

30 A

COOLFAN 2 Relay and COOLFAN S/P Relay

48-52

Spare Fuses

--

--

53

Fuse Puller

--

--

Fuse Block - Underhood 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 Control

A6

--

--

Not Used

A7

GRY

532

Cooling Fan Motor Supply Voltage

A8

--

--

Not Used

A9

PNK

1200

Headlamp High Beam Signal

A10-A11

--

--

Not Used

A12

DK GRN

29

Horn Control

B1

BLK/WHT

99

Windshield Washer Fluid Level Signal

B2-B3

--

--

Not Used

B4

BRN/WHT

309

Right Park Lamp Supply Voltage

B5

--

--

Not Used

B6

LT BLU/BLK

14

Left Turn Signal Lamps Supply Voltage

B7

PPL

709

Left Park Lamp Supply Voltage

B8

--

--

Not Used

B9

DK BLU

15

Right Turn Signal Lamps Supply Voltage

B10-B12

--

--

Not Used

C1-C4

--

--

Not Used

C5

TAN/WHT

312

Right Headlamp Low Beam Supply Voltage

C8

BLK

250

Ground

C9

--

--

Not Used

C10

PPL

34

Front Fog Lamps Supply Voltage

C11

PPL/WHT

34

Front Fog Lamps Supply Voltage

C12- D9

--

--

Not Used

D10

WHT

504

Cooling Fan Motor Low Reference

D11-D12

--

--

Not Used

E1-E4

--

--

Not Used

E5

YEL

712

Left Headlamp Low Beam Supply Voltage

E6-E9

--

--

Not Used

E10

LT BLU

409

Cooling Fan Motor Supply Voltage

E11-E12

--

--

Not Used

F1-F5

--

--

Not Used

F6

LT GRN/BLK

311

Right Headlamp High Beam Supply Voltage

F7

DK GRN/WHT

711

Left Headlamp High Beam Supply Voltage

F8-F10

--

--

Not Used

F11

BLK

250

Ground

F12

--

--

Not Used

Fuse Block - Underhood 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

Ignition 3 Voltage

A2- A12

--

--

Not Used

B1

BLK/WHT

99

Windshield Washer Fluid Level Signal

B2-B4

--

--

Not Used

B5

BRN/WHT

309

Right Park Lamp Supply Voltage

B6

ORN

240

Battery Positive Voltage

B7-B9

--

--

Not Used

B10

LT GRN/

BLK

592

DRL Relay Control

B11

--

--

Not Used

B12

ORN

2040

Battery Positive Voltage

ORN

2040

Battery Positive Voltage

C1

--

--

Not Used

C2

BLK/WHT

1969

Headlamp High Beam Relay Control

BLK/WHT

1969

Headlamp High Beam Relay Control

C3-C5

--

--

Not Used

C8

PNK

639

Ignition 1 Voltage

C9-C10

--

--

Not Used

C11

DK GRN/

WHT

1317

Fog Lamp Relay Control

C12

--

--

Not Used

D1

DK GRN

1483

Control Power Output

D2

BRN

4

Accessory Voltage

BRN

4

Accessory Voltage

D3

--

--

Not Used

D4

PNK/WHT

1970

Headlamp Low Beam Relay Control

PNK/WHT

1970

Headlamp Low Beam Relay Control

D5-D9

--

--

Not Used

D10

BLK

28

Horn Relay Control

BLK

28

Horn Relay Control

D11

--

--

Not Used

D12

PNK

70

RAP Relay Switch Supply Voltage

E1-E5

--

--

Not Used

E6

LT BLU

14

Left Turn Signal Lamps Supply Voltage

E7

PPL

709

Left Park Lamp Supply Voltage

E8-E9

--

--

Not Used

E10

PNK

3

Ignition 1 Voltage

E11

PPL

34

Front Fog Lamps Supply Voltage

E12

ORN

3540

Battery Positive Voltage

F1

--

--

Not Used

F2

YEL

43

Accessory Voltage

F3

YEL

143

Accessory Voltage

F4

--

--

Not Used

F5

RED

228

Windshield Washer Pump Control

F6-F8

--

--

Not Used

F9

DK BLU

15

Right Turn Signal Lamps Supply Voltage

F10-F12

--

--

Not Used

Fuse Block - Underhood 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

Ignition 1 Voltage (w/NC8)

A5

--

--

Not Used

A6

PNK/BLK

239

Ignition 1 Voltage

A7

--

--

Not Used

A8

PNK

339

Ignition 1 Voltage

A9- A10

--

--

Not Used

A11

DK GRN/

WHT

459

A/C Clutch Relay Control

A12

--

--

Not Used

B1-B2

--

--

Not Used

B3

PNK

139

Ignition 1 Voltage

B4

PNK/BLK

139

Ignition 1 Voltage

B5

--

--

Not Used

B6

PNK

239

Ignition 1 Voltage

B7- B8

--

--

Not Used

B9

PNK/BLK

239

Ignition 1 Voltage

B10

DK BLU

473

High Speed Cooling Fan Relay Control

B11-B12

--

--

Not Used

C1

--

--

Not Used

C2

YEL

447

Starter Relay Coil Control

C3

PPL

6

Starter Solenoid Crank Voltage

C4

PNK/WHT

139

Ignition 1 Voltage (w/L67)

C5-C8

--

--

Not Used

C9

PNK

539

Ignition 1 Voltage

C10

--

--

Not Used

C11

DK GRN

59

A/C Compressor Clutch Supply Voltage

C12

--

--

Not Used

D1-D3

--

--

Not Used

D4

PNK/BLK

339

Ignition 1 Voltage

D5

ORN

240

Battery Positive Voltage

D8

PNK/BLK

839

Ignition 1 Voltage

D9

PNK/WHT

539

Ignition 1 Voltage

D10-D12

--

--

Not Used

E1

--

--

Not Used

E2

RED

78

AIR Pump Supply Voltage (w/NC8)

E3

BRN

436

AIR Pump Relay Control (w/NC8)

E4

PNK

339

Ignition 1 Voltage

E5-E6

--

--

Not Used

E7

PNK

739

Ignition 1 Voltage

E8- E12

--

--

Not Used

F1

BRN

241

Ignition 3 Voltage

F2-F7

--

--

Not Used

F8

DK GRN

335

Low Speed Cooling Fan Relay Control

F9

PNK

39

Ignition 1 Voltage

F10- F12

--

--

Not Used

Fuse Block - Underhood C4


Object Number: 258627  Size: CH

Connector Part Information

    • 15319799
    • 2-Way F (GRN)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RED

442

Battery Positive Voltage

Fuse Block - Rear Label


Object Number: 477322  Size: MF

Fuse Block - Rear Label Usage

No.

Fuse/Circuit Breaker

Rating

Description

1

F/PMP Fuse

20 A

F/PMP Relay

2

HVAC BLO Fuse

30 A

Blower Motor Control Processor

3

MEM Fuse

10 A

Memory Seat Module - Driver, Power Seat Lumbar Switch - LF, and Power Seat Switch - LF (w/A45)

4

ALDL Fuse

10 A

DLC and Valet Switch

5

RR FOG Fuse

10 A

RR FOG LP Relay

6

CD Fuse

10 A

Remote Playback Device (CD Changer)

7

DRV MDL Fuse

10 A

DDM

8

SIR Fuse

15 A

SDM

9

--

--

Not Used

10

LP PK R Fuse

10 A

Park/Stop Lamps, Right Tail/Stop Lamp, and Side Marker Lamp

11

VENT SOL Fuse

10 A

EVAP Canister Purge Vent Valve

12

IGN 1 Fuse

10 A

IPC, RIM, TCC/Cruise Release Switch, and Turn Signal/Multifunction Switch

13

LP PK L Fuse

10 A

Left Tail/Stop Lamp, Side Marker Lamp, and Park/Stop Lamps

14

DIMR Fuse

10 A

License Plate Lamps and DIM

15

--

--

Not Used

16

HTDST LF Fuse

10 A

Left Heated Seat Module

17

--

--

Not Used

18

RRDR MDL Fuse

10 A

Rear Door Modules

19

STOP LP Fuse

15 A

Stop Lamp Switch

20

PRK/REV Fuse

10 A

PARK and REVERSE Relays

21

AUDIO Fuse

10 A

Radio

22

RAP Fuse

20 A

RAP Relay

23

--

--

Not Used

24

--

--

Not Used

25

PASSMDL Fuse

10 A

FPDM

26

BODY Fuse

15 A

F/TNKDR REL and TRK REL Relays

27

INT LP Fuse

10 A

INT LP Relay

28

--

--

Not Used

29

IGN SW Fuse

15 A

DIM, Ignition Switch, RCDLR, and RIM

30

I/P Fuse

10 A

Ignition Switch Lamp and IPC

31

HTDST RF Fuse

10 A

Right Heated Seat Module

32

--

--

Not Used

33

HVAC Fuse

10 A

Air Temperature Acuators, BCM, IPM, Mode Actuator, and Recirculation Actuator

34

IGN 3 RR

10 A

HVAC Control Module (w/CJ2) or IPM (w/C67), Inside Rear View Mirror, and Shift Control Assembly

35

ABS Fuse

10 A

EBCM

36

TSIG/HAZ Fuse

15 A

Turn Signal/Hazard Lamp Control Module

37

HVAC BATT Fuse

10 A

IPM

38

DIM Fuse

10 A

DIM and Generator

39

F/PMP Relay

--

Fuel Pump/Sender Assembly and PCM

40

PRK LP Relay

--

DIMR, LP PK L, LP PK R Fuses, and DIM

41

IGN Relay

--

IGN 1 Fuse, VENT SOL Fuse, SIR Fuse, DIM, and Ignition Switch

42

RR FOG LP Relay (Oldsmobile)

--

DIM, Ignition Switch, Rear Fog Lamps, and RIM

43

--

--

Not Used

44

PARK Relay

--

Ignition Switch, RIM, and Stop Lamp Switch

45

REVERSE Relay

--

Backup Lamps and RIM

46

RAP Relay

--

Power Sunroof Module and RIM

47

F/TNKDRLOCK Relay

--

Fuel Door Release Solenoid

48

--

--

Not Used

49

IGN 3 Relay

--

Ignition Switch

50

F/TNKDR REL Relay

--

Fuel Filler Door Release Solenoid and RIM

51

INT LP Relay

--

Front Door Courtesy Lamps, Rear Door Courtesy Lamps, Footwell Courtesy Lamps, I/P Compartment Lamp and Switch, Overhead Console Reading/Courtesy Lamp, Rear Compartment Courtesy Lamps, Rear Reading Courtesy Lamp, and Vanity Lamps

52

TRK REL Relay

--

Rear Compartment Lid Release Actuator and RIM

53

FRT CTSY Relay

--

RIM

54

--

--

Not Used

55

ELC (ALC) Relay

--

Automatic Level Control (ALC) Compressor, Ignition Switch, and RIM

56

PWR SEAT Circuit Breaker

30 A

Memory Seat Module - Driver (w/A45), Power Seat Switch - LF (w/o A45), Power Seat Lumbar Switch - LF (w/o A45), Power Seat Recline Switch - RF (w/o AG2), Power Seat Switch - RF (w/AG2), and Power Seat Lumbar Switch - RF (w/AG2)

57

PWR WDO Circuit Breaker

30 A

Door Modules

58

CIGAR Relay

--

AUX PWR and C/LTR Fuses in the Underhood Fuse Block

59

RR DEFOG Relay

--

Ignition Switch and Rear Window Defogger

60

--

--

Not Used

61

RR DEFOG Fuse

40 A

RR DEFOG Relay

62

--

--

Not Used

63

AUDIO AMP Fuse

20 A

Audio Amplifier

64

ELC (ALC) Fuse

30 A

ELC Relay and Automatic Level Control (ALC) Compressor

65

CIGAR Fuse

40 A

CIGAR Relay

66-69

--

--

Not Used

70-74

Spare Fuses

--

--

75

Fuse Puller

--

--

Fuse Block - Rear C1


Object Number: 280787  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

ORN

1340

Battery Positive Voltage

A2

--

--

Not Used

A3

BRN/WHT

309

Right Park Lamp Supply Voltage

A4

YEL

32

Instrument Panel Lamp Fuse Supply Voltage - 1

A5-A8

--

--

Not Used

A9

ORN

440

Battery Positive Voltage

A10

BRN

141

Ignition 3 Voltage

A11

ORN

300

Ignition 3 Voltage

A12

--

--

Not Used

B1

--

--

Not Used

B2

YEL

1139

Ignition 1 Voltage

B3

BRN/WHT

309

Right Park Lamp Supply Voltage

B4

PPL

709

Left Park Lamp Supply Voltage

B5

PNK/BLK

1615

Park Brake Relay Control

B6

LT GRN

275

Park Neutral Position Switch Park Signal

B7

LT BLU

2182

Reverse Lamp Relay Control

B8

LT GRN

24

Backup Lamp Supply Voltage

LT GRN

24

Backup Lamp Supply Voltage

B9-B12

--

--

Not Used

C1-C4

--

--

Not Used

C5

ORN

1640

Battery Positive Voltage

C8

LT GRN

24

Backup Lamp Supply Voltage

C9

ORN

540

Battery Positive Voltage

ORN

540

Battery Positive Voltage

C10

--

--

Not Used

C11

BRN

41

Ignition 3 Voltage

C12

BRN

241

Ignition 3 Voltage

D1

--

--

Not Used

D2

BLK

750

Ground

D3

--

--

Not Used

D4

DK GRN

1483

Control Power Output

DK GRN

1483

Control Power Output

D5-D8

--

--

Not Used

D9

PNK

70

RAP Relay Switch Supply Voltage

D10

DK GRN

1399

RAP Relay Coil Supply Voltage

D11-D12

--

--

Not Used

E1-E2

--

--

Not Used

E3

ORN

840

Battery Positive Voltage

E4

PPL

709

Left Park Lamp Supply Voltage

E5-E8

--

--

Not Used

E9

ORN

540

Battery Positive Voltage

E10

ORN

540

Battery Positive Voltage

E11

--

--

Not Used

E12

ORN

3740

Battery Positive Voltage

F1

DK GRN/

WHT

465

Fuel Pump Relay Control

F2

GRY

120

Fuel Pump Supply Voltage (w/L36)

F2

RED

458

Fuel Pump Supply Voltage (w/L67)

F3

WHT

1080

Park Lamp Relay Control

F4

--

--

Not Used

F5

ORN

840

Battery Positive Voltage

F6-F11

--

--

Not Used

F12

ORN

3740

Battery Positive Voltage

Fuse Block - Rear 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

RAP Relay Switch Supply Voltage

A7-A8

--

--

Not Used

A9

BLK/WHT

56

Trunk Release Motor Supply Voltage

A10

ORN

3640

Battery Positive Voltage

A11

BLK

750

Ground

A12

--

--

Not Used

B1-B4

--

--

Not Used

B5

ORN

2240

Battery Positive Voltage

B6-B12

--

--

Not Used

C1

ORN

3640

Battery Positive Voltage

C2-C3

--

--

Not Used

C4

ORN

2440

Battery Positive Voltage

C5

ORN

2240

Battery Positive Voltage

C8

--

--

Not Used

C9

LT BLU

1344

Trunk Release Relay Control

C10-D8

--

--

Not Used

D9

PNK

79

Fuel Door Release Solenoid

D10-D11

--

--

Not Used

D12

DK BLU/WHT

149

Courtesy Lamp Supply Voltage

E1

ORN

2840

Battery Positive Voltage

E2

PNK

3

Ignition 1 Voltage

E3-E10

--

--

Not Used

E11

TAN

2183

Inadvertent Power Relay Control

E12

DK BLU/WHT

149

Courtesy Lamp Supply Voltage

F1-F2

--

--

Not Used

F3

PNK

1239

Ignition 1 Voltage

F4-F8

--

--

Not Used

F9

WHT

93

Fuel Door Release Relay Control

F10-F12

--

--

Not Used

Fuse Block - Rear 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

Battery Positive Voltage

A8-A12

--

--

Not Used

B1

ORN

640

Battery Positive Voltage

B2-B9

--

--

Not Used

B10

RED

1342

Battery Positive Voltage

B11

--

--

Not Used

B12

ORN

3340

Battery Positive Voltage

C1

--

--

Not Used

C2

ORN

1040

Battery Positive Voltage

C3

--

--

Not Used

C4

WHT

193

Rear Defog Relay Control

C5

PPL

293

Rear Defog Element Supply Voltage

C8-C9

--

--

Not Used

C10

YEL

321

Automatic Level Control Relay Coil Supply Voltage

C11

DK GRN

322

Automatic Level Control Compressor Motor Control

C12

--

--

Not Used

D1

ORN

2640

Battery Positive Voltage

D2

ORN

1040

Battery Positive Voltage

D3

PNK

1039

Ignition 1 Voltage

D4

WHT

193

Rear Defog Relay Control

D5-D11

--

--

Not Used

D12

ORN

1140

Battery Positive Voltage

E1

--

--

Not Used

E2

ORN

1040

Battery Positive Voltage

E3

PNK

1039

Ignition 1 Voltage

E4-E6

--

--

Not Used

E7

TAN

2186

Fuel Door Lock Relay Supply Voltage

E8-E10

--

--

Not Used

E11

ORN

3340

Battery Positive Voltage

E12

--

--

Not Used

F1

--

--

Not Used

F2

ORN

1040

Battery Positive Voltage

F3-F5

--

--

Not Used

F6

BLK

755

RAP Relay Coil Control

F7

LT GRN

2187

Fuel Door Lock Relay Control

F8

--

--

Not Used

F9

ORN

2540

Battery Positive Voltage

F10-F11

--

--

Not Used

F12

ORN

1740

Battery Positive Voltage

Fuse Block - Rear 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

Battery Positive Voltage