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

Underhood Accessory Wiring Junction Block


Object Number: 293944  Size: FS
Figure 2:

Underhood Accessory Wiring Junction Block Label


Object Number: 379880  Size: LF

Underhood Accessory Wiring Junction Block Fuse Applications

Fuse/Circuit Breaker

Rating

Description

1-COOL FAN 2 MaxiFuse®

30A

B+ to the COOL FAN 2 relay and the COOL FAN 3 relay.

2-CRANK MaxiFuse®

40A

B+ to the CRANK relay.

3-BAT #3 MaxiFuse®

60A

B+ to the REAR DEFOG and the POWER SEATS circuit breakers.

4-BAT #2 MaxiFuse®

60A

B+ to the HIGH BLOWER, HAZARD, STOP LAMPS, DOOR LOCKS, and POWER MIRRORS fuses.

5-IGN 1 MaxiFuse®

30A

B+ to the ignition switch to the IGN 0, CLUSTER PCM and BCM, LOW BLOWER, HVAC, CRUISE, and CRANK SIGNAL BCM, CLUSTER fuses.

6-COOL FAN 1 MaxiFuse®

40A

B+ to the COOL FAN 1 relay.

7-BAT #1 MaxiFuse®

60A

B+ to the RADIO HVAC, RFA CLUSTER Data Link, ABS BCM, CIGAR LTR, AUX POWER, INADV POWER BUS and CD CHANGER fuses.

8-IGN 2 MaxiFuse®

50A

B+ to the ignition switch for the PWR WINDOWS PWR SUNROOF circuit breaker, and the ABS, BTSI, TURN SIGNALS CORN, AIR BAG, CLUSTER, DRL, PCM BCM V/H relay, WIPER, POWER DROP, and RADIO CRUISE fuses.

20-AIR PMP Fuse

30A

B+ to the AIR PMP relay.

21-GEN Fuse

10A

B+ to the generator.

22-ECM Fuse

10A

B+ to the PCM.

23-A/C CLU Fuse

10A

B+ to the A/C CLU relay.

25-(L36) DFI Fuse

15A

(w/RPO L36) Hot with the ignition switch in the ON or START position to the ICM.

25-(LX5) F/INJR Fuse

15A

(w/RPO LX 5) Hot with the ignition switch in the ON or START position to fuel injectors #2, 4, and 6, and the ICM (Front).

26-(L36) TRANS Fuse

10A

(w/RPO L36 only) Hot with the ignition switch in the ON or START position to the TCC PWM SOL valve, 1-2 SS valve, and 2-3 SS valve.

26-(LX5) TRANS/ABS

10A

(w/RPO LX5) Hot with the ignition switch in the ON or START position to the TCC PWM SOL valve, 1-2 SS valve, and 2-3 SS valve.

27-HORN Fuse

15A

B+ to the HORN relay.

28-F/INJR Fuse

15A

    • RPO L36: Hot with the ignition switch in the ON or START position to fuel injectors #1, 2, 3, 4, 5, and 6.
    • RPO LX5: Hot with the ignition switch in the ON or START position to fuel injectors #1, 3, and 5, and the ICM (rear).

29-OXY SEN Fuse

15A

Hot with the ignition switch in the ON or START position to the HO2S #1 and HO2S #2.

30-ENG EMIS Fuse

10A

Hot with the ignition switch in the ON or START position to the EVAP canister purge solenoid valve, EVAP canister vent solenoid valve, MAF sensor, stop lamp switch, and AIR PUMP Relay, secondary air injection valve (w/ RPO LX5 and NB7), and the stop lamp switch, and AIR PUMP Relay.

32-HDLP R Fuse

15A

B+ to the RH headlamp.

33-R/CMPT REL Fuse

7.5A

B+ to the transaxle range switch.

34-LP PARK Fuse

20A

B+ to the headlamp switch and the DRL control module.

35-F/PMP Fuse

15A

B+ to the F/PMP relay.

36-HDLP L Fuse

15A

B+ to the LH headlamp.

Instrument Panel Fuse Block


Object Number: 379876  Size: LF

Fuse Block Fuse Applications

Fuse/Circuit Breaker

Rating

Description

ABS Fuse (w/RPO L36 only)

10A

Hot the with ignition switch in the ON or START position to the EBTCM, electronic brake control relay, and electronic traction control switch.

ABS Fuse (w/ RPO L36 Only)

20A

Hot with the electronic brake control relay energized for the LF and RF brake solenoid valves.

ABS, BCM Fuse

10A

B+ to the BCM, and the EBTCM (w/ RPO L36).

AIR BAG Fuse

15A

Hot with the ignition switch in the ON or START position to the SDM.

BTSI Fuse

10A

Hot with the ignition switch in the ON or START position to the stop lamp switch.

CD CHANGER Fuse

10A

B+ to the CD player.

CIGAR LTR AUX POWER Fuse

20A

B+ to the accessory power receptacle, cigar lighter, and the power drop connector.

CLUSTER Fuse

10A

Hot with the ignition switch in the ON or START position to the instrument cluster.

CRANK SIGNAL BCM, CLUSTER Fuse

10A

Hot with the ignition switch in START position to the BCM, instrument cluster, and the PCM.

CRUISE Fuse

10A

Hot with the ignition switch in the ON position to the cruise control module.

DOOR LOCKS Fuse

20A

B+ to the BCM for the auto door locks and the door lock relay.

DRL Fuse

10A

Hot with the ignition switch in the ON or START position to the DRL control module.

FRT PARK LPS, FOG LAMPS Fuse

10A

Hot with parklamps on to FOG LP relay (if equipped), LH/RH front side marker lamps, and LH/RH park/turn signal lamps.

HAZARD Fuse

15A

B+ to the hazard warning switch.

HEATED MIRROR Fuse

10A

Hot with rear window defogger relay energized for the LH and RH outside rearview mirrors.

HIGH BLOWER Fuse

25A

B+ to the blower motor control module (RPO CJ2) or the blower motor resistor (RPO C67).

HVAC Fuse

10A

Hot with the ignition switch in the ON position to the day/night rear view mirror (w/ RPO DD8), DRL control module, heater-A/C control, LH electric actuator, RH electric actuator (w/ RPO CJ2), rear window defogger relay, and vacuum electric solenoid.

IGN 0 Fuse

10A

Hot with the ignition switch in the ACCY, ON, or START position to the BCM, instrument cluster, automatic transaxle control position indicator bulb, and PCM.

INADV POWER BUS Fuse

15A

B+ to the BCM for the interior lamps.

LOW BLOWER Fuse (RPO C67 Only)

20A

Hot with the ignition switch in the ON position to the heater-A/C control.

PANEL DIMMING Fuse

7.5A

Hot with parklamps on to the I/P lamp dimmer switch.

PCM BCM U/H Relay Fuse

10A

Hot with ignition switch in the ON or START position to the BCM, CRANK relay, IGN MAIN relay, and the PCM.

POWER DROP Fuse

10A

Hot with the ignition switch in the ACCY or ON position to the power drop connector.

POWER MIRRORS Fuse

2A

B+ to the outside remote control rearview mirror switch.

POWER SEATS Circuit Breaker

30A

B+ to the driver seat adjuster switch, fuel tank filler door lock relay, and the passenger seat adjuster switch (w/RPO AG2).

PWR WINDOWS PWR SUNROOF Circuit Breaker

30A

Hot with the ignition switch in the ACC or ON position to the LF window switch and the sunroof module (w/RPO CF5).

RADIO, CRUISE Fuse

2A

Hot with the ignition switch in the ACC or ON position to the cruise control switch, radio, and steering wheel control switches.

RADIO, HVAC, RFA, CLUSTER, DATA LINK Fuse

15A

B+ to the DLC, heater-A/C control, instrument cluster, low frequency audio amplifier (w/RPO U85), radio, and the RCDLR.

REAR DEFOG Circuit Breaker

30A

B+ to rear window defogger relay.

RED STRG WHL ILLUM Fuse

2A

Variable dimming signal to the steering wheel control switches.

STOP LAMPS Fuse

15A

B+ to the stop lamp switch.

TAIL LAMPS, LIC LAMPS Fuse

15A

Hot with parklamps on to the LH/RH rear side marker lamps, LH/RH tail/stop lamps, PANEL DIMMING fuse, and the rear license plate lamps.

TURN SIGNALS CORN LPS Fuse

10A

Hot with the ignition switch in the ON or START position to the hazard warning switch and the turn signal switch.

WIPER Fuse

25A

Hot with the ignition switch in the ACC or ON position to the windshield wiper motor and the windshield wiper/washer switch