GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Underhood Accessory Wiring Junction Block (View A)


Object Number: 326300  Size: LF
Figure 2:

Underhood Accessory Wiring Junction Block (View B)


Object Number: 326304  Size: MF

Underhood Accessory Wiring Junction Block Fuse Applications

Fuse

Name

Rating

Description

1

COOL FAN 2

30A

Coolant Fans

3

HEADLAMPS

60A

HEADLAMP Circuit Breaker, HVAC HI, PWR MIR, HAZARD and RAP Fuses

4

BATT MAIN 2

60A

SEAT Circuit Breaker and R DEFOG, H SEAT/LUM and PWR LOCK Fuses

5

IGN MAIN 1

40A

Ignition Switch to BTSI, DRL, IP- IGN, TURN, SIR, I/P-IGN, CRUISE and ECM Fuses

6

COOL FAN 1

30A

Coolant Fans

7

BATT MAIN 1

60A

CD CHG, AUX/CNSL, STOP LAMP, INT LAMP and CIG LTR Fuses

8

IGN MAIN 2

60A

  1. Retained Accessory Power (RAP) Relay to PWR WDO Circuit Breaker and RADIO, SUNROOF and STR WHL CTRL Fuses
  2. Ignition Switch to WIPER, MALL, MALL PGM, DIC/HVAC and HVAC CTRL Fuses

18

INJ

10A

Fuel Injectors

21

IGN1-UH

15A

Powertrain Controlled Devices: Mass Air Flow Sensor, EVAP Canister Purge Solenoid Valve, Heated Oxygen Sensors and Supercharger Bypass Valve

25

ELEK IGN

15A

Ignition Control Module

27

B/U LAMP

10A

Park/Neutral Position Switch to Backup Lamps

28

A/C CLU/ABS IGN

10A

A/C CLU Relay to A/C Compressor Clutch Coil and Electronic Brake Traction Control Module (EBTCM)

29

RADIO BATT

10A

Radio, Heater-A/C Control, Remote Control Door Lock Receiver, Theft Deterrent Shock Sensor, Theft Deterrent Indicator Lamp (Security Indicator) and Trip Calculator

30

ALT SENSE

10A

Generator

31

TCC

10A

Torque Converter Clutch Controls and Stop Lamp Switch

32

FUEL PUMP

15A

FUEL PUMP Relay and F/PMP SPD CONT Relay

33

ECM SENSE

10A

Powertrain Control Module

35

FOG LP

10A

FOG LAMP Relay

36

HORN

15A

HORN Relay

37

PARK LP

20A

Headlamp Switch to Park Lamps

I/P Fuse Block


Object Number: 326296  Size: LF

I/P Fuse Block Applications

Fuse/Circuit Breaker

Rating

Description

HEADLAMP

20A

Battery to Headlamp Switch and Theft Deterrent Relay to Headlamps

SEAT

20A

Battery to Driver Seat Adjuster Switch, Lumbar Relays

PWR WDO

25A

Retained Accessory Power to Window Switches

AUX/CNSL

15A

Battery to Roof Console Accessory Power Receptacle

BTSI

10A

Ignition 0 to Automatic Transaxle Control (BTSI), Instrument Cluster PRNDL Indicators and Stop Lamp Switch

CANISTER VENT

10A

Evaporative Emissions (EVAP) Canister Vent Solenoid Valve

CD CHG

10A

Battery to Multi Disc CD Player

CIG LTR

15A

Battery to Cigar Lighter, Data Link Connector (DLC), Floor Console Accessory Power Receptacle and Auxiliary Power Drop Connector

CRUISE

10A

Ignition 1 to Cruise Control system and Turn Signal Lever

DIC/HVAC

10A

Ignition 3 to Driver Seat Heater Switch, Trip Calculator, DRL Control Module, Rear Window Defogger Relay, HVAC System: Electric Actuators, Vacuum/Electric Solenoid and Heater-A/C Control

DRL

10A

Ignition 1 to Daytime Running Lamps (DRL) Control Module

ECM

10A

Ignition 1 to Powertrain Control Module (PCM) and Underhood Accessory Wiring Junction Block: IGN MAIN Relay to IGN1-UH, INJ, ELEK IGN, TCC and A/C CLU/ABS IGN Fuses

H SEAT/LUM

15A

Battery to Driver Seat Heater Control Module and Lumbar Adjuster Switch

HAZARD

15A

Battery to Turn Signal Switch for Hazard Flasher

HVAC CTRL

20A

Ignition 3 to Heater-A/C Control (C60)

HVAC HI

30A

Battery to Blower Motor Control Module (CJ2) or Blower Motor Resistor (C60)

I/P-IGN

10A

Ignition 1 to Instrument Cluster, Body Control Module (BCM), Driver Information Display/Trip Computer, Head-Up Display (HUD) Dimmer Switch

INT LAMP

10A

Battery to Body Control Module (BCM) for Courtesy Lamps

MALL

10A

Accessory Power to Body Control Module (BCM)

MALL PGM

10A

Accessory Power to Body Control Module (BCM) for Programming Inputs

PWR DROP

10A

Auxiliary Power Drop Connector

PWR LOCK

15A

Battery to Body Control Module (BCM) for Power Door Locks

PWR MIR

10A

Battery to Outside Remote Control Rearview Mirror Switch

R DEFOG

30A

Battery to Rear Window Defog Relay

RADIO

10A

Retained Accessory Power to Radio

RADIO AMP

20A

Low Frequency Audio Amplifier

RAP

10A

Battery to Retained Accessory Power (RAP) Relay

SIR

15A

Ignition 1 to Inflatable Restraint Sensing and Diagnostic Module (SDM)

STOP LAMP

15A

Battery to Stop Lamp Switch

STR WHL CTRL

2A

Retained Accessory Power to Steering Wheel Radio Control Switches

STR WHL ILUM

2A

Switched dimming signal to Steering Wheel Radio Control Switches

SUNROOF

20A

Retained Accessory Power to Sunroof and Inside Rearview Mirror

TURN

10A

Ignition 1 to Turn Signal Switch for Turn Signal Lamps

WIPER

25A

Accessory Power to Windshield Wiper Switch and Motor

Figure 3:

Cell 11: 3100 (VIN M) INJ Fuse


Object Number: 325610  Size: FS
Power and Grounding Components
Cell 11: 3800 (VIN K and 1) INJ Fuse
Cell 10: Underhood Accessory Wiring Junction Block
Figure 4:

Cell 11: 3800 (VIN K and 1) INJ Fuse


Object Number: 325637  Size: FS
Power and Grounding Components
Cell 11: TCC, ELEK IGN and A/C CLU/ABS IGN Fuses
Cell 11: 3100 (VIN M) INJ Fuse
Cell 10: Underhood Accessory Wiring Junction Block
Figure 5:

Cell 11: TCC, ELEK IGN and A/C CLU/ABS IGN Fuses


Object Number: 325639  Size: FS
Power and Grounding Components
Cell 11: IGN1-UH Fuse
Cell 11: 3800 (VIN K and 1) INJ Fuse
Cell 10: Underhood Accessory Wiring Junction Block
Figure 6:

Cell 11: IGN1-UH Fuse


Object Number: 325644  Size: FS
Power and Grounding Components
Cell 11: B/U LAMP, ECM SENSE, ALT SENSE, FUEL PUMP, FOG LP and HORN Fuses
Cell 11: TCC, ELEK IGN and A/C CLU/ABS IGN Fuses
Cell 10: Underhood Accessory Wiring Junction Block
Figure 7:

Cell 11: B/U LAMP, ECM SENSE, ALT SENSE, FUEL PUMP, FOG LP and HORN Fuses


Object Number: 325647  Size: FS
Power and Grounding Components
Cell 11: RADIO BATT and PARK LP Fuses
Cell 11: IGN1-UH Fuse
Figure 8:

Cell 11: RADIO BATT and PARK LP Fuses


Object Number: 325648  Size: FS
Power and Grounding Components
Cell 11: DRL, CANISTER VENT, PWR DROP, TURN, SIR, IP-IGN, CRUISE and ECM Fuses
Cell 11: B/U LAMP, ECM SENSE, ALT SENSE, FUEL PUMP, FOG LP and HORN Fuses
Cell 10: Underhood Accessory Wiring Junction Block
Figure 9:

Cell 11: DRL, CANISTER VENT, PWR DROP, TURN, SIR, IP-IGN, CRUISE and ECM Fuses


Object Number: 325649  Size: FS
Power and Grounding Components
Cell 11: CD CHNG, AUX CNSL, STOP LAMP, INT LAMP, CIG LTR Fuses
Cell 11: RADIO BATT and PARK LP Fuses
Figure 10:

Cell 11: CD CHNG, AUX CNSL, STOP LAMP, INT LAMP, CIG LTR Fuses


Object Number: 325652  Size: FS
Power and Grounding Components
Cell 11: HVAC HI, PWR MIR, HAZARD, RAP, REAR DEFOG, H SEAT/LUM, PWRLOCK, RADIO Fuses
Cell 11: DRL, CANISTER VENT, PWR DROP, TURN, SIR, IP-IGN, CRUISE and ECM Fuses
Figure 11:

Cell 11: HVAC HI, PWR MIR, HAZARD, RAP, REAR DEFOG, H SEAT/LUM, PWR LOCK, RADIO Fuses


Object Number: 325653  Size: FS
Power and Grounding Components
Cell 11: DIC/HVAC and HVAC CTRL Fuses
Cell 11: CD CHNG, AUX CNSL, STOP LAMP, INT LAMP, CIG LTR Fuses
Figure 12:

Cell 11: DIC/HVAC and HVAC CTRL Fuses


Object Number: 325654  Size: FS
Power and Grounding Components
Cell 11: BTSI, RADIO, SUNROOF, STR WHL CTRL, STR WHL ILUM, WIPER, MALLAND MALL PGM Fuses
Cell 11: HVAC HI, PWR MIR, HAZARD, RAP, REAR DEFOG, H SEAT/LUM, PWRLOCK, RADIO Fuses
Figure 13:

Cell 11: BTSI, RADIO, SUNROOF, STR WHL CTRL, STR WHL ILUM, WIPER, MALL AND MALL PGM Fuses


Object Number: 325660  Size: FS
Power and Grounding Components
Cell 11: SEAT, HEADLAMP and POWER WINDOW Circuit Breakers
Cell 11: DIC/HVAC and HVAC CTRL Fuses
Figure 14:

Cell 11: SEAT, HEADLAMP and POWER WINDOW Circuit Breakers


Object Number: 325661  Size: FS
Power and Grounding Components
Cell 11: BTSI, RADIO, SUNROOF, STR WHL CTRL, STR WHL ILUM, WIPER, MALLAND MALL PGM Fuses