GM Service Manual Online
For 1990-2009 cars only
Table 1: Fuse Block - I/P, Relay Block - I/P and BCM Label Usage
Table 2: Fuse Block - I/P Wire Entry Pinout
Table 3: Relay Block - I/P Wire Entry Pinout
Table 4: Fuse Block - Underhood Label Usage
Table 5: Fuse Block - Underhood C1
Table 6: Fuse Block - Underhood C2
Table 7: Fuse Block - Underhood C3
Table 8: Fuse Block - Underhood C4

Fuse Block - I/P, Relay Block - I/P and BCM Label


Object Number: 1481736  Size: LF

Object Number: 1478927  Size: LF

Fuse Block - I/P, Relay Block - I/P and BCM Label Usage

No.

Device

Rating

Description

1

Spare fuse

--

Spare Fuse Holder

2

Spare fuse

--

Spare Fuse Holder

3

Spare fuse

--

Spare Fuse Holder

4

Spare fuse

--

Spare Fuse Holder

5

Fuse Puller

--

Fuse Puller

6

REVERSE LAMP Relay

--

REVERSE LAMPS Fuse and Backup Lamps

7

RUN/CRANK Relay

--

ECM Fuse

8

PARK BRAKE SOL A

20A

PARK BRK RELEASE Relay

9

REVERSE LAMPS

10A

Back Up Lamp - Left and Back Up Lamp - Right

10

BTSI SOL/COL LOCK

10A

Steering Column Lock Control Module and Automatic Transmission Shift Lever

11-12

Not Used

--

Not Used

13

GMLAN DEVICES

20A

ACC/TCM Fuse

14

RPA/H/C SEAT

10A

Heated Seats, Rear Object Sensor Control Module and Diode 2

15

DOOR LOCKS

15A

BCM Logic

16

ECM

15A

CRANK Relay

17

INTERIOR LIGHTS

10A

BCM Logic

18

SDM/PSIR SW

10A

Inflatable Restraint Sensing and Diagnostic Module (SDM) and Inflatable Restraint I/P Module Disable Switch

19

Not Used

--

Not Used

20

ONSTAR

10A

Vehicle Communication Interface Module (VCIM) and Cellular Microphone

21

ACCA/DRIV DR SW

10A

Distance Sensing Cruise Control Module and Driver Door Switch Assembly (DDSA)

22

TILT/TELE SW/MEM SEAT MOD

10A

Folding Top Switch, Tilt/Telescope Switch, Memory Seat Switch, Memory Seat Module - Driver and Seat Adjuster Switch - Driver

23

IGNITION SW/INTR SENS

10A

Intrusion Sensor and BCM Logic

24

STOP LAMP Relay

--

Center High Mounted Stop Lamp (CHMSL), Capacitor CP 200 and BCM Logic

25

ISRVM/HVAC

10A

HVAC Control Module, Theft Deterrent Alarm Siren, Steering Column Lock Control Module, Air Temperature Sensor - Inside and Inside Rearview Mirror

26

CLUSTER

15A

Instrument Panel Cluster (IPC) and Head Up Display (HUD)

27

RADIO/ANT/VICS

15A

Digital Radio Receiver, Traffic Information Receiver, Radio and Remote Playback Device - CD Player

28

TUTD SW/STRH COL SW

2A

Automatic Transmission Shift Lever, Turn Signal/Multifunction Switch and Steering Wheel Control Switch Assembly

29

HVAC/PWR SND

10A

HVAC Control Module and Theft Deterrent Alarm Siren

30

REAR FOG/ALDL TOP SW

10A

FOG RR Relay and Data Link Connector DLC

31

PWR FLDG MIR - EXT/RET

10A

F/MIR RETRACT (Export) Relay and F/MIR EXTEND (Export) Relay

32

A.C. LATCH/ PK BRK B

10A

Rear Compartment Lid Release Close Switch and PARK BRAKE HOLD Relay

33

POWER SEATS Circuit Breaker

30A

Memory Seat Module - Driver, and Seat Adjuster Switch - Front Passenger

34

DOOR CONTROLS Circuit Breaker

30A

Driver Door Module (DDM), Front Passenger Door Module (FPDM), and I/P Relay Block FUEL DOOR Relay

35

RUN/ACCESSORY POWER Fuse

10A

Outside Moisture Sensor

36-37

Not Used

--

--

38

WIPER DWELL Fuse

10A

Outside Moisture Sensor

39

STEERING WHEEL DIMMING Fuse

2A

Steering Wheel Control Switch Assembly

40

POWER LUMBAR LH/RH Fuse

15A

Lumbar Switches/Pump - Driver and Passenger

41

HEATED SEAT RH Fuse

15A

Heated/Cooled Seat Module - Passenger

42

HEATED SEAT LH Fuse

15A

Heated/Cooled Seat Module - Driver

43

COLUMN LK MODULE Fuse (Europe)

10A

Automatic Transmission Shift Lever

44

FLDG TOP/TRUNK LATCH Fuse

15A

Folding Top Closed Switch, Folding Top Module, Header Latch Switch, Header Unlatch Switch, Luggage Barrier Switch, Rear Compartment Lid Open Switch, and Rear Compartment Lid Pull-down Actuator

45

AUXILIARY POWER Fuse

20A

Auxiliary Power Outlet

46

CIGAR LIGHTER Fuse

20A

Cigar Lighter

47

PRK BRK HOLD Relay

--

Park Brake Hold Solenoid

48

PRK BRK RELEASE Relay

--

Park Brake Release Solenoid

49

F/MIR RETRACT (EXPORT)

--

Outside Rearview Mirror Motor Retract

50

FOG RR (EXPORT)

--

Rear Fog Lamps

51

F/MIR EXTEND (EXPORT)

--

Outside Rearview Mirror Motor Extend

52

FUEL DR

--

Fuel Door Release Switch and Fuel Door Release Actuator

Fuse Block - I/P Wire Entry Pinout


Object Number: 73243  Size: CH

Connector Part Information

    • OEM: 12160504
    • Service: See Catalog
    • 36-Way F Metri-Pack 280 Series, Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A1 - A3

--

--

Not Used

A4

YE

743

Accessory Voltage

A5

YE

443

Accessory Voltage

A6

YE

643

Accessory Voltage

A7

--

--

Not Used

A8

YE

543

Accessory Voltage

A9

--

--

Not Used

B1

--

--

Not Used

B2

YE

390

Instrument Panel Lamp Supply Voltage - 3

B3

YE

1491

Backlight Lamps Control

B4

RD/WH

2240

Battery Positive Voltage

RD/WH

2240

Battery Positive Voltage

B5

--

--

Not Used

B6

RD/WH

3240

Battery Positive Voltage

B7

RD/BK

742

Battery Positive Voltage

RD/BK

742

Battery Positive Voltage

B8

RD/WH

1640

Battery Positive Voltage

B9

--

--

Not Used

C1

--

--

Not Used

C2

YE

143

Accessory Voltage

YE

143

Accessory Voltage

C3

YE

243

Accessory Voltage

C4-C7

--

--

Not Used

C8

PK

5780

Windshield Wiper Motor Park Switch Signal

C9

YE

196

Windshield Wiper Motor Park Switch Signal

D1-D3

--

--

Not Used

D4

RD/WH

1540

Battery Positive Voltage

D5

RD/BK

742

Battery Positive Voltage

D6

RD/WH

1440

Battery Positive Voltage

D7

RD/BK

742

Battery Positive Voltage

D8-D9

--

--

Not Used

Relay Block - I/P Wire Entry Pinout


Object Number: 622367  Size: CH

Connector Part Information

    • OEM: 12077571
    • Service: See Catalog
    • 30-Way F Module Micro Relay (BK)
    • Indexing May Vary

Pin

Wire Color

Circuit No.

Function

A1

WH

93

Fuel Door Release Relay Control

A2

RD/WH

1440

Battery Positive Voltage

A3

RD/WH

1440

Battery Positive Voltage

A4

--

--

Not Used

A5

PK

79

Fuel Door Release Solenoid Control

B1

BK

1550

Ground

B2

L-BU

187

Rear Fog Lamp Switch Signal

B3

RD/WH

1040

Battery Positive Voltage

B4

--

--

Not Used

B5

OG

122

Rear Fog Lamp Supply Voltage

C1

BK

1550

Ground

C2

L-GN/BK

1605

Park Brake Relay Coil 1 Control

C3

RD/WH

540

Battery Positive Voltage

C4

--

--

Not Used

C5

TN

1628

Park Brake Relay A Supply Voltage

D1

BK

1550

Ground

D2

PK

1607

Park Brake Relay Coil 2 Control

D3

RD/WH

1340

Battery Positive Voltage

D4

--

--

Not Used

D5

L-GN

1627

Park Brake Relay B+ Supply Voltage

E1

L-BU

5023

Passenger Folding Mirror Motor Retract Control

E2

BK

750

Ground

E3

L-BU

191

Driver Folding Mirror Motor Retract Control

E4

BK

750

Ground

BK

750

Ground

E5

RD/WH

3140

Battery Positive Voltage

F1

YE

5004

Passenger Folding Mirror Motor Extend Control

F2

BK

750

Ground

F3

YE

190

Driver Folding Mirror Motor Extend Control

F4

BK

750

Ground

BK

750

Ground

F5

RD/WH

3140

Battery Positive Voltage

Fuse Block - Underhood Label (Early)


Object Number: 1253756  Size: LF

Fuse Block - Underhood Label (Late)


Object Number: 1593171  Size: LF

Fuse Block - Underhood Label Usage

No.

Device

Rating

Description

1

ABS/MRRTD Fuse

10A

Electronic Brake Control Module (EBCM) and Electronic Suspension Control (ESC) Module

2

HORN Fuse

15A

Generator and HORN Relay 34

3

ACC/TCM Fuse

10A

Distance Sensing Cruise Control Module (K59) and Transmission Control Module (TCM)

4

WIPER Fuse

30A

WIPER ON/OFF Relay 45 and WIPER RUN/ACC Relay 42

5

STOP/BU/LPS Fuse

15A

Capicator CP200, Body Control Module (BCM) STOP LAMP Relay 4 and REVERSE LAMPS Relay 3

6

02 SEN Fuse

15A

Heated Oxygen Sensors (HO2S)

7

BATT5 Fuse

30A

Body Control Module (BCM) TILT/TELE SW/MEM SEAT MOD, ACCA/DRIV DR SW, IGNITION SW/INTR SENS, ONSTAR, and PARK BRAKE SOL A Fuses

8

PK LAMPS Fuse

10A

PARK LAMP Relay 37

9

ETC Fuse

10A

Engine Control Module (ECM)

10

FUEL Fuse

20A

Fuel Pump Control Module

11

ECM/TCM

15A

Engine Control Module (ECM) and Transmission Control Module (TCM)

12

ODD INJ Fuse

15A

Odd Fuel Injectors and Ignition Coil/Modules

13

MRRTD Fuse

25A

Evaporative Emission (EVAP) Canister Vent Solenoid and Electronic Suspension Control (ESC) Module

14

EMISSION Fuse

15A

Evaporative Emission (EVAP) Canister Purge Solenoid

15

A/C COMP Fuse

10A

A/C COMP Relay 35

16

EVEN INJ Fuse

15A

Even Fuel Injectors and Ignition Coil/Modules

17

W/S WASH Fuse

15A

W/S WASH Relay 36

18

HDLP WASH Fuse

20A

HDLP WASH Relay 46

19

RT LO BM Fuse

20A

Right Headlamp Ballast

20

--

--

Not Used

21

LT LO BM Fuse

20A

Left Headlamp Ballast

22

FOG LP Fuse

15A

FOG LP Relay 38

23

RT HI BM Fuse

10A

Right High Beam Headlamp

24

LT HI BM Fuse

10A

Left High Beam Headlamp

25

COOLFAN Fuse (Late)

60A

Fan Control Module

26

BATT 3 Fuse

60A

Body Control Module (BCM) A.C. LATCH/PK BRK B, BTSI SOL/COL LOCK, CLUSTER, DOOR LOCKS, HVAC/PWR SND, INTERIOR LIGHTS, PWR FLDG MIR-EXT/RET, RADIO/ANT/VICS, REAR FOG/ALDL TOP SW Fuses, and RUN/CRANK Relay 2

27

ABS Fuse

60A

Electronic Brake Control Module (EBCM)

28

HVAC Fuse

40A

Blower Motor Control Processor

29

BATT2 Fuse

40A

Folding Top Module and REAR DEFOG Relay 4

30

STARTER Fuse

40A

CRANK Relay 43

31

AMP Fuse

30A

Audio Amplifier

32

COOLFAN Fuse (Early)

40A

Cooling Fan

33

BATT1 Fuse

60A

I/P Fuse Block DOOR CONTROLS and POWER SEATS Circuit Breakers, HEATED SEAT LH, HEATED SEAT RH, and POWER LUMBAR LH/RH Fuses

34

HORN Relay

--

Horns

35

A/C COMP Relay

--

A/C Compressor Clutch

36

W/S WASH Relay

--

Windshield Washer Fluid Pump

37

PARK LAMP Relay

--

Park Lamps

38

FOG LP Relay

--

Front Fog Lamps

39

HIGH BEAM Relay

--

High Beam Headlamps

40

REAR DEFOG Relay

--

Rear Window Defogger

41

WIPER HI/LO Relay

--

Wiper/Washer System

42

WIPER RUN/ACC Relay

--

Wiper/Washer System

43

CRANK Relay

--

Starter

44

IGN1 Relay

--

EMISSION, EVEN INJ, ETC, FUEL, O2, and ODD INJ Fuses and A/C COMP Relay 35

45

WIPER ON/OFF Relay

--

Wiper/Washer System

46

HDLP WASH Relay

--

Headlamp Washer Fluid Pump

47

LOW BEAM Relay

--

Low Beam Headlamps

48

SPARE FUSE

10A

Not Used

49

SPARE FUSE

15A

Not Used

50

SPARE FUSE

20A

Not Used

51

SPARE FUSE

25A

Not Used

52

SPARE FUSE

30A

Not Used

53

--

--

Not Used

54

FUSE PULLER

--

Fuse Puller

F5

DIODE 2

--

Wiper/Washer System

F16

WIPER Diode

--

Wiper/Washer System

F19

DIODE 1

--

Wiper/Washer System

Fuse Block - Underhood C1


Object Number: 647951  Size: CH

Connector Part Information

    • OEM: 15319896
    • Service: See Catalog
    • 68-Way F Metri-Pack 280 Series, Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A1

YE

61

Low Reference

A2-A9

--

--

Not Used

A10

D-GN

29

Horn Control

A11

--

--

Not Used

A12

L-BU/WH

1314

Left Front Turn Signal Lamp Supply Voltage

L-BU/WH

1314

Left Front Turn Signal Lamp Supply Voltage (T90)

B1-B8

--

--

Not Used

B9

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage (T90)

B10-B11

--

--

Not Used

B12

YE/BK

68

Low Coolant Level Indicator Control

C1

--

--

Not Used

C2

RD/BK

342

Battery Positive Voltage (Early)

C3

--

--

Not Used

C4

D-GN/WH

711

Left Headlamp High Beam Supply Voltage

C5-C9

--

--

Not Used

C10

BK

1250

Ground

C11-C12

--

--

Not Used

D1

--

--

Not Used

D2

OG

1732

Courtesy Lamps Supply Voltage

D3

--

--

Not Used

D4

L-GN/BK

311

Right Headlamp High Beam Supply Voltage

D5-D9

--

--

Not Used

D10

PU

34

Fog Lamps Supply Voltage

PU

34

Fog Lamps Supply Voltage

D11-D12

--

--

Not Used

E1

--

--

Not Used

E2

YE

712

Left Headlamp Low Beam Supply Voltage

E3-E12

--

--

Not Used

F1

--

--

Not Used

F2

TN/WH

312

Right Headlamp Low Beam Supply Voltage

F3

OG

228

Windshield Washer Pump Control

F4

TN/WH

99

Windshield Washer Fluid Level Signal

F5-F6

--

--

Not Used

F7

L-GN/BK

735

Ambient Air Temperature Sensor Signal

F8

--

--

Not Used

F9

PU

333

Brake Fluid Level Sensor Signal

F10

--

--

Not Used

F11

BN

9

Park Lamp Supply Voltage

BN

9

Park Lamp Supply Voltage

F12

PU

1197

Headlamp Washer Pump Control

Fuse Block - Underhood C2


Object Number: 684889  Size: CH

Connector Part Information

    • OEM: 15319895
    • Service: See Catalog
    • 68-Way F Metri-Pack 280 Series, Flexlock (GY)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

RD/WH

2540

Battery Positive Voltage

A3-A4

--

--

Not Used

A5

D-GN/WH

459

A/C Compressor Clutch Relay Control

A6-A8

--

--

Not Used

A9

PK

139

Run/Crank Ignition 1 Voltage

A10

--

--

Not Used

A11

PK

139

Run/Crank Ignition 1 Voltage

PK

139

Run/Crank Ignition 1 Voltage

A12

--

--

Not Used

B1

BK

1250

Ground

BK

1250

Ground

B2

D-GN/WH

817

Vehicle Speed Signal

B3

--

--

Not Used

B4

PK

439

Run/Crank Ignition 1 Voltage

B5

D-GN

59

A/C Compressor Clutch Supply Voltage

B6-B10

--

--

Not Used

B11

PK

139

Run/Crank Ignition 1 Voltage

PK

139

Run/Crank Ignition 1 Voltage

B12

--

--

Not Used

C1-C5

--

--

Not Used

C8

PK

539

Run/Crank Ignition 1 Voltage

C9-C12

--

--

Not Used

D1-D4

--

--

Not Used

D5

RD/WH

2840

Battery Positive Voltage

D8

PK

39

Run/Crank Ignition 1 Voltage

D9

--

--

Not Used

D10

PK

339

Run/Crank Ignition 1 Voltage

PK

339

Run/Crank Ignition 1 Voltage

D11

RD/WH

244

Battery Positive Voltage

RD/WH

2440

Battery Positive Voltage

D12

--

--

Not Used

E1

BK

1250

Ground

E2

--

--

Not Used

E3

YE

43

Accessory Voltage

YE/BK

43

Accessory Voltage

E4

WH/BK

448

Powertrain Diagnostic Enable

E5

--

--

Not Used

E6

PK

39

Run/Crank Ignition 1 Voltage

PK

39

Run/Crank Ignition 1 Voltage

E7

PK

39

Run/Crank Ignition 1 Voltage

PK

39

Run/Crank Ignition 1 Voltage

E8

--

--

Not Used

E9

PK

239

Run/Crank Ignition 1 Voltage

E10

PK

339

Run/Crank Ignition 1 Voltage

PK

339

Run/Crank Ignition 1 Voltage

E11

PK

1239

Run/Crank Ignition 1 Voltage

PK

1239

Run/Crank Ignition 1 Voltage

E12

YE/BK

625

Starter Enable Relay Control

F1

BN/WH

419

Check Engine Indicator Control

F2-F3

--

--

Not Used

F4

WH

17

Stop Lamp Switch Signal

F5

--

--

Not Used

F6

WH

121

Engine Speed Signal

F7-F9

--

--

Not Used

F10

PK

1439

Run/Crank Ignition 1 Voltage

PK

1439

Run/Crank Ignition 1 Voltage

F11

PK

1339

Run/Crank Ignition 1 Voltage

PK

1339

Run/Crank Ignition 1 Voltage

F12

PU

6

Starter Solenoid Crank Voltage

Fuse Block - Underhood C3


Object Number: 647949  Size: CH

Connector Part Information

    • OEM: 15319894
    • Service: See Catalog
    • 68-Way F Metri-Pack 280 Series, Flexlock (WH)

Pin

Wire Color

Circuit No.

Function

A1

YE

243

Accessory Voltage

A2

YE

196

Windshield Wiper Motor Park Switch Signal

A3

YE

43

Accessory Voltage

A3

YE

43

Accessory Voltage (Japan)

A4

WH

17

Stop Lamp Switch Signal

A5

TN/WH

99

Windshield Washer Fluid Level Sensor Signal

A6

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage

A7

L-GN/BK

735

Outside Ambient Air Temperature Sensor Signal

A8

--

--

Not Used

A9

PK

1439

Run/Crank Ignition 1 Voltage

A10

--

--

Not Used

A11

WH

2282

Headlamp Washer Relay Control

A12

TN

28

Horn Relay Control

B1

OG

1732

Electronic Control Unit 12-Volt Reference - 3

B2

TN/WH

1969

Headlamp High Beam Relay Control

B3-B4

--

--

Not Used

B5

RD/WH

1740

Battery Positive Voltage

B6

GY

91

Windshield Wiper Motor Relay Coil Supply Voltage

GY

91

Windshield Wiper Motor Relay Coil Supply Voltage

B7

L-GN

1715

Windshield Wiper Switch High Signal

L-GN

1715

Windshield Wiper Switch High Signal

B8-B10

--

--

Not Used

B11

RD/WH

640

Battery Positive Voltage

B12

--

--

Not Used

C1

--

--

Not Used

C2

BN/WH

419

Check Engine Indicator Control

C3

D-GN/WH

817

Vehicle Speed Signal

C9

WH

1080

Park Lamp Relay Control

C10

BN

9

Park Lamp Supply Voltage

BN

9

Park Lamp Supply Voltage

C11

BN

9

Park Lamp Supply Voltage

BN

9

Park Lamp Supply Voltage

C12

L-BU/WH

1314

Left Front Turn Signal Lamp Supply Voltage

D1

--

--

Not Used

D2

D-GN

95

Windshield Wiper Motor Low Speed Control

D3

PU

92

Windshield Wiper Motor High Speed Control

D4-D5

--

--

Not Used

D8

WH

121

Engine Speed Signal

D9

--

--

Not Used

D10

WH

193

Rear Defog Relay Control

D11

RD/WH

2440

Battery Positive Voltage

D12

--

--

Not Used

E1-E6

--

--

Not Used

E7

YE

143

Accessory Voltage

E8

PK

839

Run/Crank Ignition 1 Voltage

E9

--

--

Not Used

E10

D-GN

1927

Radio Antenna/Rear Window Defog Control Module Supply Voltage

E11

PK

1139

Run/Crank Ignition 1 Voltage

E12

--

--

Not Used

F1

PK/WH

1970

Headlamp Low Beam Relay Control

PK/WH

1970

Headlamp Low Beam Relay Control

F2

PK

94

Windshield Washer Switch Signal

F3

PK

94

Windshield Washer Switch Signal

PK

94

Windshield Washer Switch Signal

F4

YE

61

Outside Ambient Temperature Sensor Low Reference

F5

--

--

Not Used

F6

BN

9

Park Lamp Supply Voltage

F7

YE/BK

68

Low Coolant Level Indicator Control

F8-F9

--

--

Not Used

F10

PU

333

Brake Fluid Level Sensor Signal

F11

D-GN/WH

1317

Fog Lamp Relay Control

F12

RD/BK

642

Battery Positive Voltage

Fuse Block - Underhood C4


Object Number: 684927  Size: CH

Connector Part Information

    • OEM: 15329012
    • Service: See Catalog
    • 8-Way F Metri-Pack 800 Series (BK)

Pin

Wire Color

Circuit No.

Function

A1

RD/BK

442

Battery Positive Voltage

A2

RD/BK

742

Battery Positive Voltage

B1

RD/BK

1442

Battery Positive Voltage

B2

--

--

Not Used

C1

RD/BK

242

Battery Positive Voltage

C2

RD/BK

142

Battery Positive Voltage

D1

RD/BK

342

Battery Positive Voltage

D2

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Not Used