GM Service Manual Online
For 1990-2009 cars only
Table 1: Fuse Block - Underhood Label Usage
Table 2: Relay Block - ABS Label Usage
Table 3: Fuse Block - Instrument Panel Label Usage
Table 4: Fuse Block - Instrument Panel C3 (W/Sunroof)
Table 5: Fuse Block - Instrument Panel C3 (w/o Sunroof)
Table 6: Fuse Block - Instrument Panel C4
Table 7: Fuse Block - Instrument Panel C5
Table 8: Fuse Block - Instrument Panel C6
Table 9: Fuse Block - Instrument Panel C7
Table 10: Fuse Block - Instrument Panel C8
Table 11: Fuse Block - Instrument Panel C9
Table 12: Fuse Block - Instrument Panel C10
Table 13: Fuse Block - Instrument Panel C11
Table 14: Fuse Block - Instrument Panel C12
Table 15: Fuse Block - Instrument Panel C13
Table 16: Junction Block - Instrument Panel - Right Label Usage
Table 17: Junction Block - Instrument Panel Right C1
Table 18: Junction Block - Instrument Panel Right C2
Table 19: Junction Block - Instrument Panel Right C3

Fuse Block - Underhood Label Usage

Fuse

Rating

Description

AC COMPRESSOR Relay

--

A/C Compressor Clutch and Powertrain Control Module (PCM)

HEAD Relay

--

DIMMER Relay, HEAD LH Fuse, and HEAD RH Fuse, and Daytime Running Lamps Control Module

DIMMER Relay

--

Daytime Running Lamps Control Module, Headlamp - Left, Headlamp - Right, and Instrument Panel Cluster

HORN Relay

--

Horn, Horn Switch, Multifunction Alarm Module (w/Keyless Entry), Theft Deterrent Module (If equipped)

FAN No. 2 Relay

--

Brake Pressure Modulator Valve (BPMV)

FAN No. 1 Relay

--

Fan Motor and Powertrain Control Module (PCM)

HEAD MAIN Fuse

30A

HEAD Relay

ALT S Fuse

5A

Generator

EFI Fuse

15A

EFI Relay and Powertrain Control Module

HAZARD Fuse

10A

Flasher Relay

HORN Fuse

10A

HORN Relay

DOME Fuse

15A

CD Changer (If equipped), Front Dome Lamp, Instrument Panel Cluster, Keyless Entry Module, Radio, Rear Dome Lamp, and Sunroof Relay

MAIN Fuse

30A

Fuse Block - Instrument Panel AM2 Fuse and ST Relay

AMP Fuse (If Equipped)

25A

Radio Amplifier

ALT Fuse

100A

ABS No. 1, ABS No. 2, FOG, RDI FAN Fuses, Fuse Block - Instrument Panel AM1, DEF, DOOR, ECU - B, HEATER, INV, OBD, POWER, P/POINT, STOP, and TAIL Fuses, and IG 1 Relay

ABS No. 2 Fuse

40A

Relay Block - ABS ABS CUTOFF Relay (JL4) and Brake Pressure Modulator Valve (BPMV)

RDI FAN Fuse

40A

FAN No. 1 Relay

ABS No. 1 Fuse

30A

Brake Pressure Modulator Valve (BPMV)

FOG Fuse

15A

FOG Relay

HEAD RH Fuse

15A

Headlamp - Right and Instrument Panel Cluster

HEAD LH Fuse

15A

Headlamp - Left

EFI Relay

--

Fuse Block - Instrument Panel C/OPN Relay, Auxiliary Intake Air Control Solenoid (LNK Only), EVAP Canister Purge Solenoid Valve, EVAP Canister Vent Solenoid Valve, EVAP Pressure Switching Solenoid, Heated Oxygen Sensor 1 (HO2S1), Heated Oxygen Sensor 2 (HO2S2), Idle Air Control (IAC) Valve, Mass Air Flow (MAF) Sensor, and Powertrain Control Module (PCM)

FOG Relay

--

Fog Lamp - Left Front, Fog Lamp - Right Front, and Fog Lamp Switch

Fuse Block - Underhood Top View


Object Number: 787265  Size: MF

Relay Block - ABS Label Usage

Fuse

Rating

Description

ABS CUTOFF Relay

--

ABS MTR Relay and Brake Pressure Modulator Valve (BPMV)

ABS MTR Relay

--

Brake Pressure Moduluator Valve (BPMV)

Relay Block - ABS Top View


Object Number: 1464261  Size: MF

Fuse Block - Instrument Panel Label Usage

Fuse

Rating

Description

C/OPN Relay

--

Fuel Pump

TAIL Fuse

15A

Junction Block - Instrument Panel - Right TAIL Relay

OBD Fuse

7.5A

Data Link Connector (DLC)

WIPER Fuse

25A

Wiper Motor - Front and Wiper/Washer Switch

AM2 Fuse

15A

Ignition Switch

STOP Fuse

15A

Stop Lamp Switch

DOOR Fuse

25A

Multifunction Alarm Module

AM1 Fuse

25A

Ignition Switch

ECU - IG Fuse

10A

Fuse Block - Underhood FAN No. 1 Relay and FAN No. 2 Relay, Brake Pressure Modulator Valve (BPMV), Glass Breakage Sensor (w/Theft Deterrent), Theft Deterrent Module (w/Theft Deterrent), Cruise Control Module, Deceleration Sensor (ABS, AWD), and Shift Lock Control Module

RR WIPER Fuse

15A

Rear Wiper Relay 1

AC Fuse

10A

Fuse Block - Underhood A/C Compressor Clutch Relay, A/C/Fresh/Recirculation Switch, and Defogger Mode Switch

INV Fuse

15A

Junction Block - Instrument Panel - Right INV Relay

P/POINT Fuse

15A

Junction Block - Instrument Panel - Right P/POINT Relay

ECU - B Fuse

10A

Daytime Running Lamps Control Module, Glass Breakage Sensor (w/Theft Deterrent), and Theft Deterrent Module (w/Theft Deterrent)

CIG Fuse

15A

Cigar Lighter - Front, Power Mirror Switch, P - Point Relay, and Radio

GAUGE Fuse

10A

HEATER Relay, P/W Relay, Multifunction Alarm Module, 115V Power Outlet Switch, AC/Fresh/Recirculation Switch, Backup Lamp Switch (M/T), Cruise Control Release Switch, Daytime Running Lamps (DRL) Control Module, FLASHER Relay, Generator, Instrument Panel Cluster, Park/Neutral Position (PNP) Switch (4WD/2WD), Passenger Seat Belt Warning Lamp, Rear Wiper Diode, and Vehicle Speed Sensor (VSS) (LV6, 2WD w/o ABS)

WASHER Fuse

15A

Washer Motor - Front and Washer Motor - Rear

BLOWER/DEF IDLE - UP Fuse

10A

Powertrain Control Module (PCM)

HEATER Fuse

40A

HEATER Relay

DEF Fuse

30A

DEF Relay

POWER Fuse

30A

P/W Relay

DEF Relay

--

BLOWER/DEF IDLE - UP Fuse, Rear Defogger, and Rear Defogger Noise Filter

IG 1 Relay

--

ECU - IG Fuse, GAUGE Fuse, RR WIP Fuse, WASH Fuse, and WIPER Fuse

P/W Relay

--

Sunroof Switch Assembly, Window Switch - Left Front, Window Switch - Left Rear, Window Switch - Right Front, Window Switch - Right Rear

ST Relay

--

Starter

Fuse Block - Instrument Panel Top View


Object Number: 787266  Size: MF

Fuse Block - Instrument Panel Bottom View


Object Number: 787267  Size: LF

Fuse Block - Instrument Panel C3 (W/Sunroof)


Object Number: 335024  Size: CH

Connector Part Information

    • 90980-10797
    • WH

Pin

Wire Color

Function

1

WH/BK

Ground - Sunroof Switch

2

BK

Ignition Positive Voltage - Sunroof Relay

3

BK

Battery Positive Voltage - Sunroof

4

BU/WH

Battery Positive Voltage - Dome Lamp

5

--

Not Used

6

RD/YE

Ground - Dome Lamp

Fuse Block - Instrument Panel C3 (w/o Sunroof)


Object Number: 335024  Size: CH

Connector Part Information

    • 90980-10797
    • WH

Pin

Wire Color

Function

1

BK

Ground - Map Lamp

2

--

Not Used

3

BK

Battery Positive Voltage - Map Lamp

4

BU/WH

Battery Positive Voltage - Dome Lamp

5

--

Not Used

6

RD/YE

Ground - Dome Lamp

Fuse Block - Instrument Panel C4


Object Number: 820226  Size: CH

Connector Part Information

    • 90980-12104
    • WH

Pin

Wire Color

Function

1

GN/YE

Right Front Turn Lamp Supply Voltage

2

GN

Park/Turn Lamp Supply Lamp

3

BU/WH

A/C Compressor Relay Supply Voltage

4

--

Not Used

5

GN/WH

Stop Lamp Supply Voltage

6

--

Not Used

7

BU/WH

Battery Positive Voltage

8

GN/BK

Left Front Turn Lamp Supply Voltage

9

BU

Ignition Positive Voltage - Washer

10

--

Not Used

11

BU

Ignition Positive Voltage - Wiper Motor

12

BK/WH

Ignition Positive Voltage

13

BK/WH

Ignition Positive Voltage

14

RD/WH

Battery Positive Voltage - Stop Lamp

15-16

--

Not Used

Fuse Block - Instrument Panel C5


Object Number: 820228  Size: CH

Connector Part Information

    • 90980-12106
    • WH

Pin

Wire Color

Function

1

RD/WH

Driver Door Open Indicator Signal

2

GN

Ignition Positive Voltage - Tail Lamps/License Plate Lamps

3-5

--

Not Used

6

RD/BK

Ignition Positive Voltage - Backup Lamps

7

GN/WH

Battery Positive Voltage - Stop Lamps

8

BU/RD

Remote Control Door Lock Receiver

9

BU

Rear Tailgate Lock Signal

10

GN/YE

Keyless Entry Program Circuit

11

BU/WH

Ignition Positive Voltage - Rear Wiper Relay

12

GN/YE

Ignition Positive Voltage - Right Rear Turn Lamp

13

BU/YE

Battery Positive Voltage - Keyless Entry

14

RD/BK

Courtesy Switch Signal - Left Rear

15

RD/YE

Courtesy Switch Signal - Right Rear

16

RD

Courtesy Switch Signal - Tail Gate/Glass Hatch

17

GN/BK

Ignition Positive Voltage - Left Rear Turn Lamp

18

BK

Ignition Positive Voltage - Left Rear Power Window Switch

19

BK/RD

Ignition Positive Voltage - Fuel Pump

20

RD

Rear Tailgate Unlock Signal

Fuse Block - Instrument Panel C6


Object Number: 334980  Size: CH

Connector Part Information

    • 90980-11604
    • WH

Pin

Wire Color

Function

1

--

Not Used

2

BK/YE

Ignition Positive Voltage - Ignition Switch

3

--

Not Used

4

WH/BK

Ground

5

BU

Ignition Positive Voltage - Rear Defogger Switch

6

BU/RD

Accessory Positive Voltage - Ignition Switch

7

BK

Ignition Positive Voltage

8

GY

Ignition Positive Voltage - Right Instrument Panel Junction Block

9

BK/WH

Ignition Positive Voltage

10-11

--

Not Used

12

WH

Battery Positive Voltage - Ignition Switch

13

--

Not Used

Fuse Block - Instrument Panel C7


Object Number: 899505  Size: CH

Connector Part Information

    • 90980-11529
    • WH

Pin

Wire Color

Function

1

GN/RD

PCM Circuit Opening Relay Control

2

RD/WH

Ignition Positive Voltage

3

RD/BK

Dome Lamp Control

4

BK

Ignition Positive Voltage

5

GN/YE

Right Turn Indicator Supply Voltage

6

GN/YE

Flasher relay Voltage Output

7

BK

Ignition Positive Voltage

Fuse Block - Instrument Panel C8


Object Number: 334469  Size: CH

Connector Part Information

    • 90980-11542
    • WH

Pin

Wire Color

Function

1

RD/BK

Battery Positive Voltage

2-4

--

Not Used

5

GN/YE

Right Turn Lamp Supply Voltage

6

BU

Battery Positive Voltage

7

GN/WH

Battery Positive Voltage - Tail Lamp Relay

8

--

Not Used

9

GN/WH

Battery Positive Voltage - Accessory Power Control Module

10

WH/BK

Ground

11

GN/BK

Left Turn Lamp Supply Voltage

12

GN/BK

Battery Positive Voltage - Left Turn Indicator

13

GN/BK

Battery Positive Voltage - Flasher Relay

Fuse Block - Instrument Panel C9


Object Number: 820098  Size: CH

Connector Part Information

    • 90980-11231
    • YE

Pin

Wire Color

Function

1

PK/BK

Diagnostic Request

2

BU/RD

Serial Data Line

3

WH/BK

Ground - Inflatable Restraint Sensing and Diagnostic Module (SDM)

4

--

Not Used

5

BK/YE

Air Bag Indicator Control

6

--

Not Used

7

YE

Fuel Pump Cutoff Signal

8

BK/OG

Ignition Positive Voltage - Inflatable Restraint Sensing and Diagnostic Module (SDM)

9

--

Not Used

10

WH/BK

Ground - Inflatable Restraint Sensing and Diagnostic Module (SDM)

Fuse Block - Instrument Panel C10


Object Number: 334470  Size: CH

Connector Part Information

    • 90980-10799
    • WH

Pin

Wire Color

Function

1

BK/YE

Air Bag Indicator Control - Inflatable Restraint Sensing and Diagnostic Module

2-3

--

Not Used

4

PK/BK

Diagnostic Request - Inflatable Restraint Sensing and Diagnostic Module

5

BU/RD

Serial Data Line - Inflatable Restraint Sensing and Diagnostic Module

6

YE

Fuel Pump Cutoff Signal

7

RD/BK

Battery Positive Voltage - On Board Diagnostics

8

BU/BK

Ground - Multifunction Alarm Module

Fuse Block - Instrument Panel C11


Object Number: 334473  Size: CH

Connector Part Information

    • 90980-10801
    • WH

Pin

Wire Color

Function

1

GN/BK

Park/Turn Lamp - Left Front - Supply Voltage

2

BU

Door Lock Signal

3

RD/WH

Door Open Indicator Supply Voltage

4

RD

Door Open Indicator Supply Voltage

5

RD/BK

Door Unlock Signal

6-7

--

Not Used

8

BK/OG

Ignition Positive Voltage - Instrument Panel Cluster

9

RD/BK

Position Signal - Park Neutral Position Switch

10

RD/BK

Position Signal - Park Neutral Position Switch

Fuse Block - Instrument Panel C12


Object Number: 428545  Size: CH

Connector Part Information

    • 90980-11539
    • WH

Pin

Wire Color

Function

1

GN/WH

Stop Lamp Switch Voltage

2

GN

Park Lamp Supply Voltage

3

RD/WH

Door Open Indicator Supply Voltage

4

BU/WH

Battery Positive Voltage

5

BK/WH

Ignition Positive Voltage - Ignition Switch

6

--

Not Used

7

BU

Windshield Wiper Supply Voltage

8

WH

Ignition Positive Voltage - I/P Cluster

9

GN/YE

Right Turn Lamp - Supply Voltage

10

BK

Defogger Relay Control

11

BK/WH

Ground

Fuse Block - Instrument Panel C13


Object Number: 820109  Size: CH

Connector Part Information

    • 90980-11583
    • WH

Pin

Wire Color

Function

1

BK

Starter Supply Voltage

2

BK/WH

Heater Relay Supply Voltage

3

BK/RD

Battery Positive Voltage

4

BK

Rear Defogger Supply Voltage

5

BK

Heater Relay Supply Voltage

6

BK

Battery Positive Voltage - Ignition Switch Supply Voltage

Junction Block - Instrument Panel Left


Object Number: 787258  Size: MF

Junction Block - Instrument Panel Left Buss Bar View


Object Number: 1462356  Size: MF

Junction Block - Instrument Panel - Right Label Usage

Fuse

Rating

Description

HEATER Relay

--

Fuse Block - Instrument Panel AC Fuse, Blower Motor, Blower Switch

INV Relay

--

Accessory AC/DC Power Control Module

P/POINT Relay

--

Center Console Rear Power Outlet

TAIL Relay

--

Daytime Running Lamps (DRL) Control Module

Junction Block - Instrument Panel - Right Top View


Object Number: 785553  Size: MF

Junction Block - Instrument Panel - Right Bottom View


Object Number: 785562  Size: MF

Junction Block - Instrument Panel Right Buss Bar View


Object Number: 1462343  Size: MF

Junction Block - Instrument Panel Right C1


Object Number: 334906  Size: CH

Connector Part Information

    • 90980-10875
    • WH

Pin

Wire Color

Function

1

RD/BK

Instrument Cluster Reverse Position Signal Voltage

2

RD/BK

Instrument Panel Fuse Block Reverse Position Signal Voltage

3

RD/LK

Right Instrument Panel Junction Block Reverse Position Signal Voltage

4

RD/BK

Navigation Radio Reverse Position Signal Voltage

5

--

Not Used

6

GY

P-Point Relay - Accessory Power Voltage

7

GY

Radio - Accessory Voltage

8

GY

Power Mirror Switch - Accessory Voltage

9

GY

Front Cigar Lighter Supply Voltage

10

GY

Accessory ON Voltage

11

WH/BK

Remote CD Changer Ground

12

WH/BK

P-Point Relay Switch Ground

13

WH/BK

115-Volt Power Outlet Ground

14

WH/BK

Passenger Seat Belt Switch Ground

15

WH/BK

Driver Seat Belt Switch Ground

16

WH/BK

Shift Lock Control Module Ground

17

WH/BK

Overdrive Switch Ground

18

--

Not Used

19

WH/BK

Theft Deterrent Module Ground

20

WH/BK

A/C Recirculation Switch Ground

21

WH/BK

Hazard Switch Ground

22

WH/BK

Accelerometer Ground

Junction Block - Instrument Panel Right C2


Object Number: 334908  Size: CH

Connector Part Information

    • 90980-11238
    • WH

Pin

Wire Color

Function

1

BU/RD

Brake Pressure Modulator Valve Data Link Connector Signal Circuit

2

BU/RD

Data Link Connector Signal Circuit

3

BU/RD

Power Train Control Module Data Link Connector Signal Circuit

4

BU/RD

Inflatable Restraint Sensing and Diagnostic Module Data Link Connector Signal Circuit

5

BK/WH

Ignition Positive Voltage

6

BK/WH

Cruise Control Module Ignition Positive Voltage

7

BK/WH

Shift Lock Control Ignition Positive Voltage

8

YE

Daytime Running Lamps Control Module Charge Input

9

YE

Instrument Panel Cluster Charge Indicator Signal

10

YE

Generator Signal Input

11

RD/WH

Park Brake Warning Lamp Ignition Positive Voltage

12

RD/WH

Heater Relay Ignition Positive Voltage

13-14

--

Not Used

15

RD/WH

Flasher Relay Ignition Positive Voltage

16

RD/WH

Instrument Panel Cluster Ignition Positive Voltage

17

RD/WH

115-Volt Power Outlet Switch Ignition Positive Voltage

18

RD/WH

A/C Recirculation Ignition Positive Voltage

19

RD/WH

Cruise Control Release Switch Ignition Positive Voltage

20

RD/WH

SP107 Ignition Positive Voltage

21

RD/WH

Rear Wiper Diode Ignition Positive Voltage

22

RD/WH

Ignition Supply Voltage

Junction Block - Instrument Panel Right C3


Object Number: 334904  Size: CH

Connector Part Information

    • 90980-10821
    • WH

Pin

Wire Color

Function

1

YE/BK

Multifunction Alarm Module Ground Signal

2

YE/BK

Flasher Relay Ground Signal

3

YE/BK

Hazard Switch Ground Signal

4

RD

Dimmer Switch Headlamp Ground Signal

5

RD

Headlamp Switch Headlamp Ground Signal

6

RD

Daytime Running Lamps Control Module Headlamp Ground Signal

7-9

--

Not Used

10

GN/WH

Shift Lock Control Module Brake Signal

11

GN/WH

Powertrain Control Module Brake Signal

12

GN/WH

Cruise Control Module Brake Signal

13

GN/WH

Stop Lamp Supply Voltage

14

BN/WH

Right Outside Rearview Mirror Switch Up Voltage

15

BN/WH

Left Outside Rearview Mirror Switch Up Voltage

16

BN/WH

Outside Rearview Mirror Switch Voltage

17

BU

Cruise Control Release Switch Drive Position Signal

18

BU

Drive Position Signal

19

BU

Cruise Control Module Drive Position Signal

20

BU

Drive Position Signal