GM Service Manual Online
For 1990-2009 cars only

Electrical Center Identification Views Domestic

Figure 1:

Underhood Fuse-Relay Center, Top View


Object Number: 326520  Size: SF
Figure 2:

Underhood Fuse-Relay Center, Bottom View


Object Number: 326525  Size: SF

Fuse/Circuit Breaker

Rating

Description

BLOWER Fuse M3-N3

60A

Blower Motor Resistor, Rear Blower Fuse

ABS Fuse M4-N4

60A

Electronic Brake Control Module

A.I.R. Fuse N2-M2

30A

A.I.R. Relay - w/K18

IGN-B Fuse M5-N5

50A

Ignition Switch

IGN-A Fuse M6-N6

40A

Starter Relay, Ignition Switch

BATT Fuse M7-N7

50A

IP Fuse Block

LIGHTING Fuse M8-N8

40A

IP Fuse Block, Headlamp Switch

AUX A Fuse R7-P7

30A

Upfitter Provisions

AUX B Fuse R8-P8

30A

Upfitter Provisions

ECM-B Fuse G12-F11

20A

Fuel Pump Relay, VCM (L35, L30, L31, L29), PCM (L65)

HORN Fuse J12-H11

20A

Horn Relay, Underhood Lamp(s)

A/C Fuse L12-K11

10A

A/C Compressor Clutch Relay

RR BLOWER Fuse K5-L6

30A

Auxiliary Blower Motor Relays

IGN-E Fuse G8-F7

10A

A/C Compressor Clutch Relay

ECM-1 Fuse H7-J8

20A

Ignition Coil, Ignition Control Module, Fuel Injectors, Crankshaft Position Sensor (L29), VCM - w/L35, L30, L31, L29

ECM-1 Fuse H7-J8

20A

PCM, Glowplug Relay, Wastegate Solenoid, Exhaust Pressure Regulator (EPR) Solenoid - wL/65

ENG-I Fuse K7-L8

20A

Heated Oxygen Sensors, Crankshaft Position Sensor (L35, L30, L31), Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission Canister Purge Valve, Evaporative Emission Canister Vent Valve, A.I.R. Relay (K18 or K19) - w/L35, L30, L31, L29

ENG-I Fuse K7-L8

20A

Water in Fuel Sensor, Fuel Heater, Fuel Shutoff Solenoid, Fuel Solenoid Driver - w/L65

Figure 3:

IP Fuse Block, Face View


Object Number: 326527  Size: SF
Figure 4:

IP Fuse Block, Rear View


Object Number: 326531  Size: SF

Fuse/Circuit Breaker

Rating

Description

STOP Fuse #1

20A

TCC/Stoplamp Switch

HTD MIR Fuse #2

20A

Heater and A/C Controller

CTSY Fuse #3

20A

Sun Shade Mirror Lamps, Dome Lamps, Stepwell Lamps, IP Compartment lamp, Power Outside Rearview Mirror Remote Control Switch

GAUGES Fuse #4

10A

Multi-function Alarm, Instrument Cluster, Vehicle Speed Sensor Buffer, Low Engine Coolant Level Indicator Module, Remote Control Door Lock Receiver, Illuminated Entry Module, DRL Module, Headlamp Switch, DRL Relay

HAZARD Fuse #5

20A

Multi-function Alarm Module, Hazard Warning Switch

CRUISE Fuse #6

10A

Cruise Control Module, Cruise Control Switch

PWR AUX Fuse #7

25A

Data Link Connector, Auxiliary Power Outlet

CRANK Fuse #8

10A

Park/Neutral Position Switch

PARK LPS Fuse #9

20A

Headlamp Switch

AIR BAGS Fuse #10

10A

Inflatable Restraint Sensing and Diagnostic Module

WIPER Fuse #11

10A

Windshield Washer/Wiper Switch

HTR-A/C Fuse #12

20A

Temperature Valve Actuator Motor, Heater and A/C Controller

CIG LTR Fuse #13

20A

Cigarette Lighter

ILLUM Fuse #14

10A

Heater and A/C Controller, Instrument Cluster, Radio, Multi-function Alarm Module, Auxiliary Blower Motor Switch, Rear Auxiliary HVAC Control Module, Front Auxiliary HVAC Control Module

DRL Fuse #15

15A

DRL Relay

TURN B/U Fuse #16

20A

Park/Neutral Position Switch, Turn Signal Switch

RADIO-I Fuse #17

10A

Radio, Power Antenna Assembly

BRAKE Fuse #18

10A

TCC/Stoplamp Switch, EBCM, VCM

RADIO-B Fuse #19

10A

Radio, Power Antenna Assembly

TRANS Fuse #20

10A

Instrument Cluster, Automatic Transmission

SECURITY STRG Fuse #21

10A

EVO/Passlock Module

RR DEFOG Fuse #22

25A

Not Used

Fuse #23

--

Not Used

RR HVAC Fuse #24

10A

Auxiliary Blower Motor Relays, Rear HVAC, Front/Rear HVAC Control Module, Heater and A/C Control Logic Module

PWR ACCY Fuse Breaker A

25A

Power Seat(s), Illuminated Entry Module, Power Door Lock Switches, Remote Control Door Lock Receiver, Power Door Lock Control Module

PWR WDO Fuse Breaker B

25A

Power Side Window Switches

Figure 5:

Convenience Center, Front View


Object Number: 326533  Size: SH
Figure 6:

Convenience Center, Rear View


Object Number: 326536  Size: SH

Cavity

Gauge/Color

Circuit #

Description

A1-A17

--

--

Not Used

B1

0.8 BRN

9

Power Door Lock Switch Lamps

B2

0.8 PPL

328

Door Jamb Switches

B3

0.8 TAN

159

Key In Warning Switch, Multi-function Alarm Module

B4

0.35 BLK/WHT

1455

Remote Control Door Lock Receiver

B5

0.8 GRY

157

Illuminated Entry Module

B6

0.35 PNK

39

Remote Control Door Lock Receiver

C1

0.8 ORN

40

Stepwell Lamps, Power Outside Rearview Mirror Remote Control Switch

C2

0.8 ORN

267

Power Outside Rearview Mirror Defogger Element

C3

--

--

Not Used

C4

0.5 TAN

201

Speaker Positive, Left Front

C5

0.5 GRY

118

Speaker Negative, Left Front

C6

0.8 WHT

156

Stepwell Lamps

D1

2 YEL

343

Power Side Window Switches

D2

2 ORN

540

Power Door Lock Switches, Remote Control Door Lock Receiver, Power Door Lock Control Module

D3

--

--

Not Used

D4

0.5 LT GRN

200

Speaker Positive, Right Front

D5

0.5 DK GRN

117

Speaker Negative, Right Front

D6

3 BLK

150

Power Door Lock Relay, Power Door Lock Module, Remote Control Door Lock Receiver, Door Jamb Switch

E1

0.8 BRN

9

Park Lamp Feed, License Plate Lamp

E2

0.8 LT BLU

14

Turn Signal Lamp, Left Rear

E3

0.8 DK BLU

15

Turn Signal lamp, Right Rear

E4

1 WHT

17

Stoplamp Feed, Center High-Mounted Stoplamp

E5

1 YEL

18

Optional Trailer Wiring (Stop/Turn Lamp Feed, Left)

E6

1 DK GRN

19

Optional Trailer Wiring (Stop/Turn Lamp Feed, Right)

E7

0.8 LT GRN

24

Backup Lamps

E8

0.8 ORN

40

Dome Lamps, Stepwell Lamps, Reading Lamps

E9

0.35 GRY

8

Auxiliary HVAC Control Module(s), Auxiliary Blower Motor Switch

E10

0.8 WHT

156

Dome Lamps

E11

0.5 BRN

341

Auxiliary Blower Motor Relays, Rear HVAC, Front/Rear HVAC Control Module, Heater and A/C Control Logic Module

E12

3 RED

1542

Auxiliary Blower Motor Relay

E13

0.8 BLK

150

Not Used

Figure 7:

IP Relay Center, Top View


Object Number: 326540  Size: MH
Figure 8:

IP Relay Center, Bottom View


Object Number: 326542  Size: MH

Cavity

Gauge/Color

Circuit #

Description

A1-B6

--

--

Not Used

B7

2 PPL

16

Turn Signal Flasher Output

B8

2 LT GRN

62

Hazard Indicator Lamp Feed

B9

0.8 LT BLU

1508

Turn/Hazard Flasher Feed

C1

0.8 ORN

340

Battery Positive Voltage

C2

0,8 PPL

359

DRL Supply voltage

C3

0.35 PNK

39

Ignition 1 Voltage

C4-C7

--

--

Not Used

C8

1 BLK

150

Turn/Hazard Flasher Ground

C9

--

--

Not Used

D1

0.35 LT BLK

592

DRL Relay Control

D3

1 TAN

12

Headlamp Low Beam Supply Voltage

Electrical Center Identification Views Export

Figure 1:

Underhood Fuse-Relay Center, Top View


Object Number: 326520  Size: SF
Figure 2:

Underhood Fuse-Relay Center, Bottom View


Object Number: 326525  Size: SF

Fuse/Circuit Breaker

Rating

Description

M1-M2, N1-N2

--

Not Used

HVAC Fuse M3-N3

60A

Blower Motor Resistor, Rear Blower Fuse

ABS Fuse M4-N4

60A

Electronic Brake Control Module

IGN-B Fuse M5-N5

50A

Ignition Switch

IGN-A Fuse M6-N6

40A

Starter Relay, Ignition Switch

BATT Fuse M7-N7

50A

IP Fuse Block

LIGHTING Fuse M8-N8

40A

IP Fuse Block, Headlamp Switch

AUX A Fuse R7-P7

50A

Upfitter Provisions

AUX B Fuse R8-P8

50A

Upfitter Provisions

ECM-B Fuse G12-F11

20A

Fuel Pump Relay, VCM (L31, L29), PCM (L65)

HORN Fuse J12-H11

20A

Horn Relay, Underhood Lamp(s)

A/C COMP Fuse L12-K11

10A

A/C Compressor Clutch Relay

RR BLOWER Fuse K5-L6

30A

Auxiliary Blower Motor Relays

IGN-E Fuse G8-F7

10A

A/C Compressor Clutch Relay

ECM-1 Fuse H7-J8

20A

Ignition Coil, Ignition Control Module, Fuel Injectors, Crankshaft Position Sensor (L29), VCM - w/L31, L29

ECM-1 Fuse H7-J8

20A

PCM, Glowplug Relay, Wastegate Solenoid, Exhaust Pressure Regulator (EPR) Solenoid - wL/65

ENG-I Fuse K7-L8

20A

Heated Oxygen Sensors, Crankshaft Position Sensor (L35, L30, L31), Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission Canister Purge Valve, Evaporative Emission Canister Vent Valve - w/L31, L29

ENG-I Fuse K7-L8

20A

Water in Fuel Sensor, Fuel Heater, Fuel Shutoff Solenoid, Fuel Solenoid Driver - w/L65

LEFT HDLP Fuse F1-G2

10A

Left Headlamp

RIGHT HDLP Fuse H1-J2

10A

Right Headlamp

LEFT HIBM Fuse F3-G4

10A

Left High Beam Headlamp

RIGHT HIBM Fuse H3-J4

10A

Right High Beam Headlamp

Figure 3:

Face View


Object Number: 367359  Size: MF
Figure 4:

Rear View


Object Number: 367362  Size: MF

Fuse/Circuit Breaker

Rating

Description

STOP Fuse #1

20A

TCC/Stoplamp Switch

HTD MIR Fuse #2

20A

Heater and A/C Controller

CTSY Fuse #3

20A

Sun Shade Mirror Lamps, Dome Lamps, Stepwell Lamps, IP Compartment lamp, Power Outside Rearview Mirror Remote Control Switch

GAUGES Fuse #4

10A

Multi-function Alarm, Instrument Cluster, Vehicle Speed Sensor Buffer, Low Engine Coolant Level Indicator Module, Remote Control Door Lock Receiver, Illuminated Entry Module, DRL Module, Headlamp Switch, DRL Relay

HAZARD Fuse #5

20A

Multi-function Alarm Module, Hazard Warning Switch

CRUISE Fuse #6

10A

Cruise Control Module, Cruise Control Switch

PWR AUX Fuse #7

25A

Data Link Connector, Auxiliary Power Outlet

CRANK Fuse #8

10A

Park/Neutral Position Switch

PARK LPS Fuse #9

20A

Headlamp Switch

AIR BAGS Fuse #10

10A

Inflatable Restraint Sensing and Diagnostic Module

WIPER Fuse #11

10A

Windshield Washer/Wiper Switch

HTR-A/C Fuse #12

20A

Temperature Valve Actuator Motor, Heater and A/C Controller

CIG LTR Fuse #13

20A

Cigarette Lighter

ILLUM Fuse #14

10A

Heater and A/C Controller, Instrument Cluster, Radio, Multi-function Alarm Module, Auxiliary Blower Motor Switch, Rear Auxiliary HVAC Control Module, Front Auxiliary HVAC Control Module

DRL Fuse #15

15A

DRL Relay

TURN B/U Fuse #16

20A

Park/Neutral Position Switch, Turn Signal Switch

RADIO-I Fuse #17

10A

Radio, Upfitter Provision Relay

BRAKE Fuse #18

10A

TCC/Stoplamp Switch, EBCM, VCM

RADIO-B Fuse #19

10A

Radio, Power Antenna Assembly

TRANS Fuse #20

10A

Instrument Cluster, Automatic Transmission

SECURITY STRG Fuse #21

10A

Power Steering Control Module

RR DEFOG Fuse #22

25A

Rear Defogger Relay

Fuse #23

--

Not Used

RR HVAC Fuse #24

10A

Auxiliary Blower Motor Relays, Rear HVAC, Front/Rear HVAC Control Module, Heater and A/C Control Logic Module

PWR ACCY Fuse Breaker A

25A

Power Seat(s), Illuminated Entry Module, Power Door Lock Switches, Remote Control Door Lock Receiver, Power Door Lock Control Module

PWR WDO Fuse Breaker B

25A

Power Side Window Switches

Figure 5:

Convenience Center (Front View)


Object Number: 367321  Size: MF
Figure 6:

Convenience Center (Rear View)


Object Number: 367325  Size: MF

Cavity

Gauge/Color

Circuit #

Description

A1-A17

--

--

Not Used

B1

0.8 BRN

9

Power Door Lock Switch Lamps

B2

0.8 PPL

328

Door Jamb Switches

B3

0.8 TAN

159

Key In Warning Switch, Multi-function Alarm Module

B4

0.35 BLK/WHT

1455

Remote Control Door Lock Receiver

B5

0.8 GRY

157/157

Illuminated Entry Module

B6

0.35 PNK

39

Remote Control Door Lock Receiver

C1

0.8 ORN

40

Stepwell Lamps, Power Outside Rearview Mirror Remote Control Switch

C2

0.8 ORN

267

Power Outside Rearview Mirror Defogger Element

C3

--

--

Not Used

C4

0.5 TAN

201

Speaker Positive, Left Front

C5

0.5 GRY

118

Speaker Negative, Left Front

C6

0.8 WHT

156

Stepwell Lamps

D1

2 YEL

343

Power Side Window Switches

D2

2 ORN

540

Power Door Lock Switches, Remote Control Door Lock Receiver, Power Door Lock Control Module

D3

--

--

Not Used

D4

0.5 LT GRN

200

Speaker Positive, Right Front

D5

0.5 DK GRN

117

Speaker Negative, Right Front

D6

3 BLK

150

Power Door Lock Relay, Power Door Lock Module, Remote Control Door Lock Receiver, Door Jamb Switch

E1

0.8 BRN

9

Park Lamp Feed, License Plate Lamp

E2

0.8 LT BLU

14

Turn Signal Lamp, Left Rear

E3

0.8 DK BLU

15

Turn Signal lamp, Right Rear

E4

1 WHT

17

Stoplamp Feed, Center High-Mounted Stoplamp

E5

1 YEL

18

Optional Trailer Wiring (Stop/Turn Lamp Feed, Left)

E6

1 DK GRN

19

Optional Trailer Wiring (Stop/Turn Lamp Feed, Right)

E7

0.8 LT GRN

24

Backup Lamps

E8

0.8 ORN

40

Dome Lamps, Stepwell Lamps, Reading Lamps

E9

0.35 GRY

8

Auxiliary HVAC Control Module(s), Auxiliary Blower Motor Switch

E10

0.8 WHT

156

Dome Lamps

E11

0.5 BRN

341

Auxiliary Blower Motor Relays, Rear HVAC, Front/Rear HVAC Control Module, Heater and A/C Control Logic Module

E12

3 RED

1542

Auxiliary Blower Motor Relay

E13

0.8 BLK

150

Not Used

Figure 7:

IP Relay Center (Top View)


Object Number: 367327  Size: MF
Figure 8:

IP Relay Center (Bottom View)


Object Number: 367328  Size: MF

Cavity

Gauge/Color

Circuit #

Description

A1

1 TAN

12

Low Beam Headlamp Feed

A2

--

--

Not Used

A3

0.35 LT GRN/BLK

592

DRL Relay Control

A4

0.8 ORN

340

Rear Fog Lamp Relay Fused Feed

A5

--

--

Not Used

A6

0.8 YEL

1977

Rear Fog Lamp Relay Coil Output

A7-A9

--

--

Not Used

B1

0.8 TAN

39

DRL Relay Coil Fused Feed

B2

0.8 PPL

359

Low Beam Headlamp Feed

B3

0.8 ORN

340

DRL Relay Fused Feed

B4

1 YEL

10

Headlamp Switch Output

B5

--

--

Not Used

B6

0.8

122

Rear Fog Lamp Feed

B7

1 PPL

16

Turn Signal Flasher Output

B8

--

--

Not Used

B9

0.8 LT BLU

1508

Turn/Hazard Flasher Feed

C1

0.8 ORN

340

DRL Rear Park Relay Coil

C2

0.8 BRN

9

Park Lamp Feed

C3

0.35 LT GRN/BLK

592

DRL Rear Park Relay Output

C4-C7

--

--

Not Used

C8

1 BLK

150

Turn/Hazard Flasher Ground

C9

--

--

Not Used

D1

0.35 LT GRN/BLK

39

DRL Rear Park Lamp Relay Coil Feed

D2

--

--

Not Used

D3

1.0 TAN

1256

Park Lamp Feed

D4-D9

--

--

Not Used