GM Service Manual Online
For 1990-2009 cars only

Electrical Center Identification Views Label

Table 1: Underhood Fuse Block
Table 2: IP Fuse Block
Table 3: Body Relay Block

Underhood Fuse Block


Object Number: 669174  Size: MF

Underhood Fuse Block

Fuse/Circuit Breaker

Rating

Description

Maxi Fuses

INT BATT

50A

AUX PWR, RDO BAT, CIGAR LTR, HAZ SW, CTSY LP, and PWR LKS Fuses

ABS

60A

Electronic Brake Control Module (EBCM)

IGN B

50A

Ignition and Start Switch

RAP

50A

Retained Accessory Power (RAP) Relay, POWER SEATS Circuit Breaker

IGN A

40A

Starter Relay and Ignition and Start Switch

STUD #2

30A

Trailer Wiring Provision (Power Aux)

Mini Fuses

TRL TRN

10A

Trailer Wiring Provision (Left Turn)

LT TRN

10A

Turn Signal Lamp, LR

BTSI

10A

Stop Lamp Switch, Automatic Transmission Controller

PARK LP

20A

Park Lamp Relay, Fog Lamp Relay (Front), Park Lamp Switch Relay and Multifunction Switch (T/SIG, HDLP, HDLP/DM, and FTP)

HVAC

30A

Blower Motor Control Module

HAZ LP

20A

Not Used

TRR TRN

10A

Trailer Wiring Provision (Right Turn)

RT TRN

10A

Turn Signal Lamp, RR

TRCHMSL

10A

Trailer Wiring Provision (Stop Lamps)

VECHMSL

10A

High Mount Stop Lamp, High Mount Stop Lamp Resistor, Tail and Stop Lamp, (LH/RH), and Cruise Control Module (CCM)

TRL B/U

10A

Trailer wiring Provision (Backup Lamps)

ECM 1

15A

Electronic Ignition Control Module (EICM), Vehicle Control Module (VCM), Crankshaft Position (CKP) Sensor, Central Sequential Fuel Injection (CSFI) Fuel Injectors 1-6

LD LEV

25A

Not Used

VEH B/U

15A

Backup Lamp, (LH/RH), and Inside Rear View Mirror

ENG 1

10A

Evaporative Emission Canister Purge Solenoid Valve (EVAP), Evaporative Emission Canister Control Valve (EVAP), Mass Air Flow (MAF) Sensor, and Camshaft Position (CMP) Sensor

OXYSEN

20A

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, Heated Oxygen Sensor (HO2S) Bank 1 Sensor 3, Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1

RR PRK

10A

Tail and Stop Lamp, RH

ECM B

20A

Fuel Pump Relay, and Vehicle Control Module (VCM)

B/U LP

25A

Backup Lamp Switch (W/ M/T) or Park/Neutral Position (PNP) and Backup Lamp Switch

IGN E

10A

A/C Compressor Relay, Rear Window Defogger Relay, Multi Function Switch (Flash To Pass), Flash To Pass Relay, Headlamp Leveling Actuator Motor, (LH/RH), headlamp Leveling Switch

LR PRK

10A

Tail and Stop Lamp, LH

RR DEFOG

30A

Rear Window Defogger Grid

TRL PRK

10A

Rear License Plate Lamp, (LH/Center/RH), and Trailer Wiring Provision (Park Lamps)

LT HDLP

15A

Headlamp LH High and Low Beam

HTD MIR

10A

Outside Rearview Mirror, (LH/RH) (Heating Element)

RT HDLP

15A

Headlamp RH High and Low Beam, Headlamp Washer Pump Relay, and Multifunction Switch (Flash To Pass)

MIR/LKS

3A

Outside Rear View Mirror Switch, Door Lock and Side Window Switch, (LH/RH), LIFT GLASS Relay, Endgate Lock Cylinder Switch

ATC

20A

Transfer Case Shift Control Module, and Transfer Case Encoder Motor

A/C

10A

A/C Compressor Relay

FOG LP

15A

Fog Lamp Relay (Rear)

TBC

10A

Body Control Module (BCM), and Remote Control Door Lock Receiver

RT TURN

10A

Turn Signal Lamp, RF, and Auxiliary Side Front Turn Signal Lamp, RH

CRANK

10A

Transfer Case Shift Control Module (M/T Only), Clutch Pedal Position Switch (M/T Only), and Park/Neutral Position (PNP) and Backup Lamp Switch (A/T Only)

LT TURN

10A

Turn Signal Lamp, LF, and Auxiliary Side Front Turn Signal Lamp, LH

FR PRK

10A

Side Marker Lamps, (LF/RF)

W/W PMP

10A

Headlamp Washer Pump Relay

IGN C

20A

Radio Antenna (Power)

STOP LP

20A

Stop Lamp Switch

HDLP W/W

15A

Headlamp Washer Pump Relay

HORN

15A

Horn, (LH/RH)

HTDSEAT

20A

Seat Heater Module, (LH/RH) (W/Heated Seats), Seat Lumbar Switch, (LH/RH) (W/Heat and Lumbar)

RR W/W

15A

Rear Window Wiper Motor

Micro Relays

F/PUMP

--

Fuel Pump

DRL

--

Not Used

LIFT GLASS

--

Endgate Window Release Actuator

A/C

--

A/C Compressor Clutch

FOG LP

--

Fog Lamp Bulb, (LH/RH) Rear, and Fog Lamp Switch, Rear

HORN

--

HORN Fuse

CHMSL

--

Not Used

Mini Relays

STARTER

--

Starter Solenoid

RR DEFOG

--

RR DEFOG, and HTD MIR Fuses

HDLP PWR

--

RT HDLP, and LT HDLP Fuses

IP Fuse Block


Object Number: 612505  Size: MF

IP Fuse Block

No.

Fuse Name

Rating

Description

1

--

--

Not Used

2

CIGAR LTR

15A

Cigar Lighter and Data Link Connector

3

CRUISE

10A

Body Control Module (BCM), Cruise Control Module (CCM), Cruise Control Switch, Lumbar Switch, (LH/RH)

4

GAUGES

10A

Body Control Module (BCM) and Instrument Cluster

5

--

--

Not Used

6

RDO IGN

10A

Radio, Outside Rear View Folding Mirror Switch, and Driver Information Display Module (DIDM)

7

HAZ SW

15A

Hazard Warning Switch

8

CTSY LP

10A

Courtesy Lamp (LH/RH) Console, Driver Information Display Module (DIDM), Inadvertent Power Relay, and Cargo Lamp

9

ABS

10A

Electronic Brake Control Module (EBCM), and Stop Lamp Switch

10

TURN

15A

Hazard Warning Switch

11

RR WIPER

15A

Rear Wiper/Washer and Endgate Window Release Switch

12

ILLUM

10A

Radio, Electronic Climate Control (ECC) Module, Headlamp Leveling Switch (UK/S. Africa), Hazard Warning Switch, Body Control Module (BCM), Transfer Case Shift Control Switch, Instrument Cluster, Driver Information Display Module (DIDM), Automatic Transmission Controller, and Rear Wiper/Washer and Endgate Window Release Switch

13

AUX PWR

25A

Accessories Power Receptacle, (LH/RH) and Accessories Power Receptacle, Rear

14

PWR LKS

15A

Door Lock Relay, Door Unlock Relay, and Driver Door Unlock Relay

15

4WD

10A

Front Axle Switch, Vehicle Control Module (VCM), Transfer Case Shift Control Module, Transfer Case Shift Solenoid, and Transfer Case Shift Control Switch

16

SIR

15A

Inflatable Restraint Sensing And Diagnostic Module

17

FRT WPR

25A

Windshield Wiper/Washer Switch and Windshield Wiper Motor

18

PARK LPS

10A

IP Ashtray Lamp, Body Control Module (BCM), Outside Rear View Mirror Switch, Door Lock and Side Window Switch, (LH/RH), and Side Window Lockout Switch

19

RDO BATT

10A

Instrument Cluster, Electronic Climate Control (ECC) Module, and Radio

20

--

--

Not Used

21

HVAC I

10A

Inside Rear View Mirror, Interior Air Temperature Sensor, HVAC Vacuum Control Solenoid Valve, Electric Actuator (Temperature), and Electronic Climate Control (ECC) Module

22

--

--

Not Used

23

CLUSTER

10A

Instrument Cluster, Vehicle Control Module (VCM), Automatic Transmission Controller, 1-2 Shift Solenoid (1-2 SS) Valve, 2-3 Shift Solenoid (2-3 SS) Valve, 3-2 Shift Solenoid (3-2 SS) Valve, Torque Converter Clutch Solenoid (TCC SOL) Valve, and Torque Converter Clutch Pulse Width Modulation Solenoid (TCC PWM SOL) Valve

24

--

--

Not Used

Body Relay Block


Object Number: 612384  Size: LF

Body Relay Block

No.

Relay/Circuit Breaker

Rating

Description

1

Park Lamp Relay

--

Is controlled by the BCM, powers the Fog Lamp Relay (Rear), FR PRK, LR PRK, RR PRK, TRL PRK, and PRK LPS Fuses in IP Fuse Block, Park Lamp Switch Relay, and IP Dimmer Switch

2

Courtesy Lamp Relay

--

Is controlled by the BCM, grounds the Cargo Lamp, Map Light (part of the Driver Information Display Module), and Courtesy Lamp, (LH/RH) Console

3

Retained Accessory Power Relay

--

Is controlled by the BCM, switches IGN+ and B+ power to the RDO IGN fuse in the IP Fuse Block and Power Windows Circuit Breaker

4

Power Seats Circuit Breaker

25A

Powers the Seat Adjuster Switch, (LH/RH) and Lumbar Switch, LH

5

Power Window Circuit Breaker

30A

Powers the Sunroof Module, Side Window Regulator Motor (LH/RH), Door Lock and Side Window Switch (RH), and Side Window Lockout Switch

6

Inadvertent Power Relay

--

Is controlled by the BCM, powers the IP Compartment Lamp, Sunshade Mirror Lamp (LH/RH), Underhood Lamp, and Courtesy Lamp Relay (coil side),

7

Door Lock Relay

--

Is controlled by the BCM, switches B+ and Ground to all Door Lock Actuators

8

Fog Lamp Relay (Front)

--

Is controlled by the BCM, powers Fog Lamp Bulb, (LH/RH Front) and Fog Lamp Switch (Front) on indicator lamp

9

Driver Door Unlock Relay

--

Is controlled by the BCM, switches B+ and Ground to the Door Lock Actuator, RH

10

Door Unlock Relay

--

Is controlled by the BCM, switches B+ and Ground to all Door Lock Actuators

Electrical Center Identification Views Terminal Location Views

Figure 1:

Underhood Fuse Block


Object Number: 612508  Size: LF
Figure 2:

Body Relay Block


Object Number: 612510  Size: LH