GM Service Manual Online
For 1990-2009 cars only

Electrical Center Identification Views Domestic

Table 1: Underhood Fuse-Relay Center, Bottom View
Table 2: IP Fuse Block, Rear View
Table 3: Convenience Center, Rear View
Table 4: IP Relay Center, Bottom View
Table 5: Fuse Applications - Rear Fuse Block with Y91

Underhood Fuse-Relay Center, Top View


Object Number: 668882  Size: SF

Underhood Fuse-Relay Center, Bottom View


Object Number: 326525  Size: SF

Underhood Fuse-Relay Center, Bottom View

Fuse/Circuit Breaker

Rating

Description

AUX A Fuse P7-R7

50A

Upfitter Provisions

AUX B Fuse P8-R8

30A

Upfitter Provisions

LIGHTING Fuse M8-N8

40A

IP Fuse Block, Headlamp Switch

BATT Fuse M7-N7

50A

IP Fuse Block

IGN-A Fuse M6-N6

40A

Starter Relay, Ignition Switch

IGN-B Fuse M5-N5

50A

Ignition Switch

ABS Fuse M4-N4

60A

Electronic Brake Control Module

HVAC Fuse M3-N3

60A

Blower Motor Resistor Assembly

A.I.R. Fuse M2-N2

30A

Secondary Air Injection (AIR) Pump Relay - w/K18

RR Blower Fuse H5-J6

30A

Low Speed Blower Motor Relay-Auxiliary, Med Speed Blower Motor Relay-Auxiliary, High Speed Blower Motor Relay-Auxiliary

ETC Fuse K5-L6

15A

Throttle Actuator Control Module, PCM - w/L18

ECM-B Fuse F11-G12

20A

Fuel Pump Relay, PCM

HORN Fuse H11-J12

20A

Horn Relay, Underhood Lamp

A/C Fuse K11-L12

10A

A/C Compressor Clutch Relay

ENG-I Fuse K7-L8

20A

Heated Oxygen Sensors, Mass Air Flow Sensor, Evaporative Emission Canister Purge Solenoid, Evaporative Emission Canister Vent Solenoid, Secondary Air Injection Relay - w/o L65

ENG-I Fuse K7-L8

20A

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

ECM-1 Fuse H7-J8

20A

Ignition Control Module, Ignition Coils, PCM, Fuel Injectors - w/L35, L30, L31

ECM-1 Fuse H7-J8

20A

Ignition Coils, Fuel Injectors - w/L18

ECM-1 Fuse H7-J8

20A

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

IGN-E Fuse F7-G8

10A

A/C Compressor Clutch Relay

IP Fuse Block, Face View


Object Number: 326527  Size: SF

IP Fuse Block, Rear View


Object Number: 669308  Size: SF

IP Fuse Block, Rear View

Fuse/Circuit Breaker

Rating

Description

PWR WDO Fuse B

25A

Window Switches

HTD MIR Fuse #2

20A

HVAC Controller

RR DEFOG Fuse #22

25A

Rear Window Defogger Relay

HAZARD Fuse #5

20A

Multifunction Alarm Module, Hazard Switch

PWR ACCY Fuse A

25A

Interior Lamp Control Module, Door Lock Switches, Remote Control Door Lock Receiver, Door Lock Control Module, Door Lock Relay, Seats Switches

STOP Fuse #1

20A

TCC/Brake Lamp Switch

PWR AUX Fuse #7

25A

Data Link Connector, Auxiliary Power Outlet

CIG LTR Fuse #13

25A

Cigar Lighter

RADIO-B Fuse #19

15A

Radio, Instrument Panel Cluster

PARK LPS Fuse #9

20A

Headlamp Switch

SECURITY Fuse #21

10A

Passlock Module

DRL Fuse #15

15A

DRL Control Module

CTSY Fuse #3

20A

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

AIR BAGS Fuse #10

10A

Inflatable Restraint Sensing and Diagnostic Module

TURN B/U Fuse #16

20A

Park/Neutral Position Switch, Turn Signal Switch

RADIO-I Fuse #17

10A

Radio

WIPER Fuse #11

25A

Windshield Washer/Wiper Switch

TRANS Fuse #20

10A

Instrument Cluster, PCM, Automatic Transmission

CRANK Fuse #8

10A

Park/Neutral Position Switch

GAUGES Fuse #4

10A

Passlock Module, Multifunction Alarm, Instrument Cluster, Vehicle Speed Sensor Buffer, Fuel Sender Buffer Module, Engine Coolant Level Module, Remote Control Door Lock Receiver, Interior Lamp Control Module, DRL Module, Headlamp Switch, Inside Rearview Mirror, Fog Lamp Enable Relay

CRUISE Fuse #6

10A

Cruise Control Module, Cruise Control Switch

HTR-A/C Fuse #12

20A

Air Temperature Actuator, HVAC Controller

BRAKE Fuse #18

10A

TCC/Brake Lamp Switch, EBCM

RR HVAC Fuse #24

10A

Auxiliary Blower Motor Relays, Auxiliary Mode Actuator, Front/Rear HVAC Control Module, Auxiliary HVAC Control Processor

ILLUM Fuse #14

10A

HVAC Controller, Instrument Cluster, Radio, Multifunction Alarm Module, Auxiliary Blower Motor Switch, Rear Auxiliary HVAC Control Module, Front Auxiliary HVAC Control Module

Fuse #23

--

Not Used

Convenience Center, Front View


Object Number: 326533  Size: SH

Convenience Center, Rear View


Object Number: 326536  Size: SH

Convenience Center, Rear View

Cavity

Gage/Color

Circuit No.

Description

A1

0.5 BRN

199

Left Rear Speaker Output (+)

A2

0.5 YEL

116

Left Rear Speaker Output (-)

A3

0.5 DK BLU

46

Right Rear Speaker Output (+)

A4

0.5 LT BLU

115

Right Rear Speaker Output (-)

A5-A17

--

--

Not Used

B1

0.8 BRN

9

Park Lamp Supply Voltage

B2

0.8 PPL

328

Interior Lamp Defeat Switch Signal

B3

0.8 TAN

159

Key In Ignition Switch Signal

B4

0.35 BLK/WHT

1455

Keyless Entry Program Enable Signal

B5

0.8 GRY

157

Interior Lamp Control

B6

0.35 PNK

39

Ignition 1 Voltage

C1

0.8 ORN

40

Battery Positive Voltage

C2

0.8 ORN

1540

Battery Positive Voltage

C3

0.8 ORN

267

Battery Positive Voltage

C4

0.5 TAN

201

Left Front Speaker Output (+)

C5

0.5 GRY

118

Left Front Speaker Output (-)

C6

0.8 WHT

156

Courtesy Lamp Low Control

D1

2 YEL

343

Accessory Voltage

D2

2 ORN

540

Battery Positive Voltage

D3

--

--

Not Used

D4

0.5 LT GRN

200

Right Front Speaker Output (+)

D5

0.5 DK GRN

117

Right Front Speaker Output (-)

D6

3 BLK

150

Ground

E1

0.8 BRN

9

Park Lamp Supply Voltage

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

Stop Lamp Switch Signal

E5

1 YEL

18

Left Rear Stop/Turn Lamp Supply Voltage

E6

1 DK GRN

19

Right Rear Stop/Turn Lamp Supply Voltage

E7

0.8 LT GRN

24

Backup Lamp Supply Voltage

E8

0.8 ORN

40

Battery Positive Voltage

E9

0.35 GRY

8

Instrument Panel Lamp Supply Voltage - 1

E10

0.8 WHT

156

Courtesy Lamp Low Control

E11

0.5 BRN

341

Ignition 3 Voltage

E12

3 RED

1542

Battery Positive Voltage

E13

0.8 BLK

150

Ground

IP Relay Center, Top View


Object Number: 669314  Size: SF

IP Relay Center, Bottom View


Object Number: 669319  Size: SF

IP Relay Center, Bottom View

Cavity

Gage/Color

Circuit No.

Description

A1-A9

--

--

Not Used

B1-B6

--

--

Not Used

B7

2 PPL

16

Turn Signal Flasher Signal

B8

2 LT GRN

62

Hazard Indicator Supply Voltage

B9

0.8 LT BLU

1508

Turn/Hazard Module Supply Voltage

C1-C7

--

--

Not Used

C8

1 BLK

150

Ground

C9

--

--

Not Used

D1-D9

--

--

Not Used

Rear Fuse Block with Y91 - Front


Object Number: 780180  Size: SF
(1)Fog Lamp Relay
(2)Amplifier Relay
(3)Power Amplifier Fuse
(4)Fog Light Fuse
(5)Bose Amplifier Fuse
(6)Auxiliary Power Fuse
(7)RSA-T Fuse

Rear Fuse Block with Y91 - Back


Object Number: 780182  Size: SF

Fuse Applications - Rear Fuse Block with Y91

Fuse/Circuit Breaker

Rating

Description

Power Amplifier Fuse

20A

100 Watt Amplifiers - Front and Rear; Bose 2000AMP Amplifiers - 1 and 2, turn on signal

Fog Light Fuse

10A

Front Fog Lamps

Bose Amplifier Fuse

20A

Bose 2000AMP Amplifiers - 1 and 2

Auxiliary Power Fuse

15A

Rear Accessory Power Outlet

RSA-T Fuse

10A

RSA-T Module

Electrical Center Identification Views Export

Table 1: Underhood Fuse-Relay Center, Bottom View
Table 2: IP Fuse Block, Rear View
Table 3: Convenience Center, Rear View
Table 4: IP Relay Center, Bottom View

Underhood Fuse-Relay Center, Top View


Object Number: 326520  Size: SF

Underhood Fuse-Relay Center, Bottom View


Object Number: 326525  Size: SF

Underhood Fuse-Relay Center, Bottom View

Fuse/Circuit Breaker

Rating

Description

M1-N1

--

Not Used

M2-N2

30

A.I.R.

HVAC Fuse M3-N3

60A

Blower Motor Resistor Assembly

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 P7-R7

50A

Upfitter Provisions

AUX B Fuse P8-R8

50A

Upfitter Provisions

ECM-B Fuse F11-G12

20A

Fuel Pump Relay, PCM

HORN Fuse H11-J12

20A

Horn Relay, Underhood Lamp

A/C Fuse K11-L12

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 Control Module, Ignition Coils, PCM, Fuel Injectors - w/L31

ECM-1 Fuse H7-J8

20A

PCM, Glowplug Relay, Wastegate Solenoid, Exhaust Pressure Regulator (EPR) Solenoid - w/L65

ENG-I Fuse K7-L8

20A

Heated Oxygen Sensors, Mass Air Flow Sensor, Evaporative Emission Canister Purge Solenoid, Evaporative Emission - w/o L65

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

IP Fuse Block, Face View


Object Number: 367359  Size: MF

IP Fuse Block, Rear View


Object Number: 367362  Size: MF

IP Fuse Block, Rear View

Fuse/Circuit Breaker

Rating

Description

STOP Fuse #1

20A

TCC/Brake Lamp 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, Outside Rearview Mirror Switch

GAUGES Fuse #4

10A

Multifunction Alarm, Instrument Cluster, Vehicle Speed Sensor Buffer, Low Coolant Level Module, Vehicle Immobilizer Module (VIM), Interior Lamp Control Module, DRL Module, Headlamp Switch, DRL Relay, Headlamp Leveling Switch, Headlamp Leveling Actuators

HAZARD Fuse #5

20A

Multifunction Alarm Module, Hazard 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

25A

Windshield Washer/Wiper Switch

HTR-A/C Fuse #12

20A

Air Temperature Actuator, HVAC Controller

CIG LTR Fuse #13

25A

Cigar Lighter

ILLUM Fuse #14

10A

HVAC Controller, Instrument Cluster, Radio, Multifunction Alarm Module, Auxiliary Blower Motor Switch, Rear Auxiliary HVAC Control Module, Front Auxiliary HVAC Control Module

DRL Fuse #15

15A

DRL Relay, DRL Rear Park Lamp Relay, Rear Fog Lamp 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/Brake Lamp Switch, EBCM

RADIO-B Fuse #19

15A

Radio, Instrument Panel Cluster

TRANS Fuse #20

10A

Instrument Cluster, PCM, Automatic Transmission

SECURITY Fuse #21

10A

Passlock Module

RR DEFOG Fuse #22

25A

Rear Defogger Relay

Fuse #23

--

Not Used

RR HVAC Fuse #24

10A

Auxiliary Blower Motor Relays, Auxiliary Mode Actuator, Front/Rear HVAC Control Module, Auxiliary HVAC Control Module

PWR ACCY Fuse Breaker A

25A

Seat Switches, Interior Lamp Control Module, Door Lock Switches, Remote Control Door Lock Receiver, Door Lock Control Module, Door Lock Relay

PWR WDO Fuse Breaker B

25A

Window Switches

Convenience Center, Front View


Object Number: 367321  Size: MF

Convenience Center, Rear View


Object Number: 367325  Size: MF

Convenience Center, Rear View

Cavity

Gage/Color

Circuit No.

Description

A1

0.50 BRN

199

Left Rear Speaker Output (+)

A2

0.50 YEL

116

Left Rear Speaker Output (-)

A3

0.50 DK BLU

46

Right Rear Speaker Output (+)

A4

0.50 LT BLU

115

Right Rear Speaker Output (-)

A5-A6

--

--

Not Used

A7

1 WHT

17

Stop Lamp Switch Signal

A8

0.35 PPL

1807

Class 2 Serial Data

A9

0.35 PPL

1807

Class 2 Serial Data

A10

0.8 DK GRN

1655

Ground Illumination Relay Control

A11

0.35 YEL

749

Security Indicator Signal

A12-A17

--

--

Not Used

B1

0.8 BRN

9

Park Lamp Supply Voltage

B2

0.8 PPL

328

Interior Lamp Defeat Switch Signal

B3

0.8 TAN

159

Key In Ignition Switch Signal

B4

0.35 BLK/WHT

1455

Keyless Entry Program Enable Signal

B5

0.8 GRY

157

Interior Lamp Control

B6

0.35 PNK

39

Coolant Temperature Signal

C1

0.8 ORN

40

Battery Positive Voltage

C2

3 ORN

1540

Battery Positive Voltage

C3

0.8 ORN

267

Battery Positive Voltage

C4

0.5 TAN

201

Left Front Speaker Output (+)

C5

0.5 GRY

118

Left Front Speaker Output (-)

C6

0.8 WHT

156

Courtesy Lamp Low Control

D1

2 YEL

343

Accessory Voltage

D2

2 ORN

540

Battery Positive Voltage

D3

--

--

Not Used

D4

0.5 LT GRN

200

Right Front Speaker Output (+)

D5

0.5 DK GRN

117

Right Front Speaker Output (-)

D6

3 BLK

150

Ground

E1

0.8 BRN

9

Park Lamp Supply Voltage

E2

0.8 LT BLU

14

Turn Signal Lamp, Left Rear Supply Voltage

E3

0.8 DK BLU

15

Turn Signal Lamp, Right Rear Supply Voltage

E4

1 WHT

17

Stop Lamp Switch Signal

E5

1 YEL

18

Left Rear Stop/Turn Lamp Supply Voltage

E6

1 DK GRN

19

Right Rear Stop/Turn Lamp Supply Voltage

E7

0.8 LT GRN

24

Backup Lamp Supply Voltage

E8

0.8 ORN

40

Battery Positive Voltage

E9

0.35 GRY

8

Instrument Panel Lamp Supply Voltage - 1

E10

0.8 WHT

156

Dome Lamps

E11

0.5 BRN

341

Ignition 3 Voltage

E12

3 RED

1542

Battery Positive Voltage

E13

0.8 RED

122

Rear Fog Lamp Supply Voltage

IP Relay Center, Top View


Object Number: 367327  Size: MF

IP Relay Center, Bottom View


Object Number: 367328  Size: MF

IP Relay Center, Bottom View

Cavity

Gage/Color

Circuit No.

Description

A1

0.8 RED

122

Rear Fog Lamp Supply Voltage

A2

--

--

Not Used

A3

0.8 YEL

1977

Rear Fog Lamp Relay Control

A4-A9

--

--

Not Used

B1

1 YEL

10

Headlamp Switch Signal

B2

--

--

Not Used

B3

0.8 ORN

340

Battery Positive Voltage

B4-B6

--

--

Not Used

B7

1 PPL

16

Turn Signal Flasher Control

B8

--

--

Not Used

B9

0.8 LT BLU

1508

Turn/Hazard Module Supply Voltage

C1-C3

--

--

Not Used

C4

0.8 ORN

340

Battery Positive Voltage

C5

0.8 BRN

9

Park Lamp Supply Voltage

C6

0.35 PNK

39

Ignition 1 Voltage

C7

--

--

Not Used

C8

1 BLK

150

Ground

C9-D3

--

--

Not Used

D4

0.35 LT GRN/BLK

592

DRL Relay Control

D6

0.8 PPL

1256

Park Lamp - Feed - Monitored - Tail Lamps - Group 1

D7-D9

--

--

Not Used