GM Service Manual Online
For 1990-2009 cars only
Table 1: Maxifuse/Minifuse Feeds
Table 2: Maxifuse To System Feeds
Table 3: Minifuses Circuit Feeds
Table 4: Relay Circuit Feeds
Table 5: Minifuses Circuit Feeds
Table 6: Relay/Module Circuit Feeds

Underhood Fuse Block (UHFB) Diagram


Object Number: 904299  Size: FP

Underhood Fuse Block (UHFB) Chart

This chart lists the maxifuses located in the underhood fuse block and the minifuses or relays they control.

Important: A label is provided on the fuse block cover for the fuse layout.

Maxifuse/Minifuse Feeds

Fuse (CB)

Color (AMP)

Mini Fuse (AMP)

ABS

Green (30)

Feeds directly to Antilock Brake System

COOL FAN

Green (30)

Cooling Fan Feeds directly to COOL FAN Relay

IGN 3

Green (30)

IGN 3 (10), Cruise (5), Recirc (10)

IGN 4

Green (30)

Feeds directly to A/C Relay, AIR PUMP Relay, WINDOW Relay. IGN 1 (10), TURN (10), B/U LP (10), EGR (10), EIS (10), PCM I (10), INJ (10), WIPER (25), AIR BAG (10), RADIO (10)

IP BATT

Green (30)

Body (10), FUEL PUMP (10), TRS 3/4 (10), TRS 2/TCC (10), TRS LP (10), Locks (20), Chime (10), Lighter (20)

PWR CONVCE

Green (30)

Feeds directly to WINDOW Relay, Sun (15) (after WINDOW Relay)

The following chart lists the maxifuses located in the underhood fuse block and the systems they control.

Important: A label is provided on the fuse block cover for the fuse layout.

Maxifuse To System Feeds

Fuse (CB)

Color (AMP)

System

ABS

Green (30)

Antilock Brake System

COOL FAN

Green (30)

Engine Cooling Fan

IGN 3

Green (30)

Heater-Air Conditioning Blower Motor, Air Recirculation Door, Rear Defogger, Antilock Brakes, Power Windows, Air Conditioning, Cruise Control, Starter Solenoid, DRL Relay, Generator, Starter Relay

IGN 4

Green (30)

Transaxle Shift Program Switch, Turn Signals, BTSI, Backup Lamps, Linear EGR Solenoid, EVAP Canister Purge Solenoid, Electronic Ignition System, I/P Cluster Telltales, Lamps and Gauges, PCM, Fuel Injectors, Radio, Windshield Wipers/Washer, SIR, DRL Module, Chime, RKE, Heated Oxygen Sensor, Coolant Level Switch

IP BATT

Green (30)

Chime, Wagon Hatch Ajar, Fuel System, Dome Lamps, Luggage Compartment Lamp, Outside Electric Mirror, Map Lamps, Radio/clock Memory, door Locks, Cigar Lighter, Automatic Transaxle Actuators, RKE, Decklid/Liftgate Release

PWR CONVCE

Green (30)

Power Windows, Power Sunroof, Rear Wiper/Washer (Wagon)

The following chart lists the minifuses, located in the underhood fuse block, and the circuits they control.

Important: A label is provided on the fuse block cover for the fuse layout.

Minifuses Circuit Feeds

Fuse

Color (AMP)

System

ABS

Red (10)

ABS Memory

ABS

Red (10)

ABS Left and Right Front Solenoids

A/C

Red (10)

Air Conditioning (Feeds directly to A/C Relay)

BRAKE

Blue (15)

Stop Lamps (Brakes)

EIS

Red (10)

Electronic Ignition System

EGR

Red (10)

Linear EGR Solenoid, Canister Purge Solenoid, Heated Oxygen Sensor, PCM

FOG LP

Blue (15)

Fog Lamps (Feeds directly to the FOG LAMP Relay)

HAZARD

Red (10)

Hazard Flasher, Instrument Panel Turn Signal/Lane Change Telltales, Front Park/Turn Lamps, Rear Tail Lamps

HORN

Red (10)

Horn (Feeds directly to HORN Relay)

INJ

Red (10)

Fuel Injectors

L HDLP

Red (10)

Left Headlamp Lights

PARK LP

Red (10)

Front Park Lamps, Rear Tail Lamps, Front Marker Lamps, Fog Lamps, License Plate Lamps, Backlight Dimming for: Instrument Panel, Radio Display, Climate Control Module, PRNDL Shift Indicator

PCM B

Red (10)

Powertrain Control Module Memory

PCM I

Red (10)

Powertrain Control Module

R HDLP

Red (10)

Right Headlamp Lights, Daytime Running Lights

RR DFG

Green (30)

Rear Window Defogger

TRS LP

Red (10)

Automatic Transaxle Line Pressure Actuator

TRS 2/TCC

Red (10)

Automatic Transaxle 2nd Gear and Torque Converter Clutch Actuators

TRS 3/4

Red (10)

Automatic Transaxle 3rd and 4th Gear Actuators

The following chart lists the relays, located in the underhood fuse block, and the systems they control.

Important: A label is provided on the fuse block cover for the fuse layout.

Relay Circuit Feeds

Relay

System

ABS

ABS System

A/C

Air Conditioning System

AIR PUMP

Air Pump System

COOL FAN

Engine Cooling

DRL

Daytime Running Lamps

FOG LAMP

Fog Lamps

HORN

Horn

Instrument Panel Fuse Block (IPFB) Diagram


Object Number: 904289  Size: FP

Instrument Panel Fuse Block Charts

The following chart lists the minifuses, located in the instrument panel fuse block, and the systems they control.

Important: A label is provided on the fuse block access panel for fuse layout.

Minifuses Circuit Feeds

Fuse

Color (AMP)

System

AIR BAG

Red (10)

Sensing and Diagnostic Module (SDM)

BODY

Red (10)

Dome Lamp, Luggage Compartment Lamp (Sedan/Coupe), Power Mirrors, Map Lamps, Liftgate/Decklid Release Switch, Power Door Locks, Datalink Connector, RKE

CRUISE

Tan (5)

Cruise Control Module, Stop Lamp (Brake) Switch, Cruise control Switch

FUEL PUMP

Red (10)

Fuel Pump

HVAC

Blue (15)

HVAC Control Head

IGN 1

Red (10)

Transaxle Shift Program Switch, I/P Cluster Telltales and Gauges, DRL, Chime, RKE

IGN 3

Red (10)

Antilock Brakes, Dimmer/Traction/Fog Switch, Rear Defogger, Power Windows, A/C, DRL, Chime, Blower Motor, Generator

LIGHTER

Yellow (20)

Cigar Lighter

LOCKS

Yellow (20)

Power Door Locks

RADIO

Red (10)

Radio

SUN

Blue (15)

Power Sunroof, Rear Wiper/Washer (Wagon)

TURN

Red (10)

Turn Signals

WIPER

Natural (25)

Windshield Wipers and Washers

The following chart lists the relays, located in the instrument panel fuse block, and the systems they control.

Important: A label is provided on the fuse block access panel for relay layout.

Relay/Module Circuit Feeds

Relay/Module

System

FLASHER MODULE

Turn Signal/Hazard Flashers, (Back side of IPFB)

FUEL PUMP

Fuel Pump, Transaxle Actuators

LOCK

Door Locks (Lock)

REAR DEFOG

Rear Defogger

UNLOCK

Door Locks (Unlock)

WINDOW

Power Windows, Power Sunroof, Rear Wiper/Washer (Wagon)

CHIME MODULE

Chime, Rear Defogger Control, Seat Belt Telltale