Hummer H2 2003 Fuse Box Info
Passenger compartment fuse box location:
The Instrument Panel Fuse Block is on the end of the instrument panel, on the driver side of the vehicle. The Center Instrument Panel Utility Block is located underneath the instrument panel, to the left of the steering column.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box (Instrument Panel Fuse Block):
| Fuse/Relay Name | Functions |
| RR WIPER | Rear Window Wiper Switch |
| SEO ACCY | Not Used |
| WS WPR | Windshield Wipers |
| TBC ACCY | Truck Body Controller Accessory |
| IGN 3 | Rear Heated Seats Modules |
| 4WD | Four Wheel Drive Switch, Electronically Controlled Air Suspension Switch/Module |
| HTR A/C | Not Used |
| LOCK (Relay) | Power Door Lock Relay |
| HVAC 1 | Inside Rearview Mirror, Climate Control System |
| L DOOR | Harness Connector |
| CRUISE | Cruise Control |
| UNLOCK (Relay) | Power Door Unlock Relay |
| RR FOG LP | Not Used |
| BRAKE | Brake Switch |
| PDM | Passenger Door Module |
| IGN 0 | Brake Transmission Shift Interlock, Powertrain Control Module, Transmission |
| TBC IGN 0 | Truck Body Controller |
| VEH CHMSL | Vehicle and Trailer Center High Mounted Stop Lamp |
| LT TRLR ST/TRN | Left Turn Signal/Stop Trailer |
| LT TRN | Left Turn Signals and Sidemarkers |
| VEH STOP | Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module |
| BODY | Harness Connector |
| RT TRLR ST/TRN | Right Turn Signal/Stop Trailer |
| RT TRN | Right Turn Signals and Sidemarkers |
| DDM | Driver Door Module |
| AUX PWR 2 | Instrument Panel and Rear Cargo Area Power Outlets |
| LOCKS | Rear Doors and Liftgate Power Lock Relay Feed |
| ECC | Not Used |
| TBC 2C | Truck Body Controller |
| FLASH | Flasher Module |
| CB LT DOORS | Left Rear Power Window Circuit Breaker and Driver Door Module |
| TBC 2B | Truck Body Controller |
| TBC 2A | Truck Body Controller |
Passenger compartment fuse box (Center Instrument Panel Fuse Block):
| Fuse/Relay Name | Functions |
| SEO | Special Equipment Option/Off-Road Lamps Harness Connector |
| TRAILER | Trailer Brake Wiring |
| UPFIT | Upfitter (Not Used) |
| SL RIDE | Ride Control (Not Used) |
| HDLR 2 | Headliner Wiring Connector 2 |
| BODY | Body Wiring Connector |
| DEFOG | Rear Defogger Relay |
| HDLNR 1 | Headliner Wiring Connector 1 |
| SPARE RELAY | Not Used |
| CB SEAT | Driver and Passenger Seat Module Circuit Breaker |
| CB RIGHT DOOR | Right Rear Power Window, Passenger Door Module |
| SPARE | Not Used |
| INFO | Infotainment Unit (Not Used) |
Engine compartment fuse box:
| Fuse/Relay Name | Functions |
| STUD #1 | Accessory Power/Trailer Wiring |
| MBEC 1 | Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors |
| BLOWER | Front Climate Control Fan |
| LBEC 2 | Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet--Rear Cargo Area and Instrument Panel |
| STUD 2 | Accessory Power/Trailer Wiring Brake Feed |
| ABS | Anti-Lock Brakes |
| VSES/ECAS | (ECAS) Electronically Controlled Air Suspension |
| IGN A | Ignition Power |
| IGN B | Ignition Power |
| LBEC 1 | Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module |
| TRL PRK | Parking Lamps Trailer Wiring |
| RR PRK | Right Rear Parking and Sidemarker Lamps |
| LR PRK | Left Rear Parking and Sidemarker Lamps |
| PARK LP | Parking Lamps Relay |
| STARTER | Starter Relay |
| INTPARK | Roof Marker Lamps |
| STOP LP | Stoplamps |
| TBC BATT | Truck Body Controller Battery Feed |
| SUNROOF | Sunroof |
| SEO B2 | Off-Road Lamps |
| 4WS | Vent Solenoid Canister |
| RR HVAC | Not Used |
| AUX PWR | Auxiliary Power Outlet — Console |
| IGN 1 | Ignition Relay |
| PCM 1 | Powertrain Control Module |
| ETC/ECM | Electronic Throttle Control, Electronic Brake Controller |
| INJ 1 | Ignition Coil, Fuel Injectors - Bank 1 |
| INJ 2 | Ignition Coil, Fuel Injectors - Bank 2 |
| IGN E | Instrument Panel Cluster, Air Conditioning Relay, Turn Signal/Hazard Switch, Starter Relay, Electronic Brake Controller TC2 Mode Switch |
| RTD | Electronic Brake Controller Battery Feed |
| TRL B/U | Backup Lamps Trailer Wiring |
| PCM B | Powertrain Control Module, Fuel Pump |
| F/PMP | Fuel Pump Relay |
| 02A | Oxygen Sensors |
| B/U LP | Backup Lamps, Automatic Transmission Shift Lock Control System |
| RR DEFOG | Rear Window Defogger |
| HDLP-HI | Headlamp High Beam Relay |
| PRIME | Not Used |
| 02B | Oxygen Sensors |
| SIR | Supplemental Inflatable Restraint System |
| FRT PRK | Front Parking Lamps, Sidemarker Lamps |
| DRL | Daytime Running Lamps (Relay) |
| SEO IGN | Rear Defog Relay |
| TBC IGN1 | Truck Body Controller Ignition |
| HI HDLP-LT | High Beam Headlamp-Left |
| LH HID | Not Used |
| DRL | Daytime Running Lamps |
| IPC/DIC | Instrument Panel Cluster/Driver Information Center |
| HVAC/ECAS | Climate Control Controller/ Electronically Controlled Air Suspension Module |
| CIG LTR | Cigarette Lighter |
| HI HDLP-RT | High Beam Headlamp-Right |
| HDLP-LOW | Headlamp Low Beam Relay |
| A/C COMP | Air Conditioning Compressor |
| A/C COMP | Air Conditioning Compressor Relay |
| RR WPR | Rear Wiper/Washer |
| RADIO | Audio System |
| SEO B1 | Mid Bussed Electrical Center, Rear Heated Seats, HomeLink |
| LO HDLP-LT | Headlamp Low Beam-Left |
| BTSI | Brake Transmission Shift Interlock System |
| CRANK | Starting System |
| LO HDLP-RT | Headlamp Low Beam-Right |
| FOG LP | Not Used (Relay) |
| FOG LP | Not Used |
| HORN | Horn Relay |
| W/S WASH | Windshield and Rear Window Washer Pump Relay |
| W/S WASH | Windshield and Rear Window Washer Pump |
| INFO | OnStar |
| RDO AMP | Radio Amplifier |
| RH HID | Not Used |
| HORN | Horn |
| EAP | Not Used |
| TREC | All-Wheel Drive Module |
| SBA | Not Used |
