Hummer H3 (2005 – 2010) Fuse Box Location & Diagrams
The Hummer H3 (2005–2010) fuse box protects essential electrical systems throughout the vehicle. Knowing the fuse box locations, fuse assignments, and diagrams makes it easier to identify electrical faults, replace blown fuses, and keep lighting, accessories, and other important components operating reliably.
Fuse Box Location
Engine Compartment Fuse Box
The engine compartment fuse block is located on the driver’s side of the engine compartment near the battery. To remove the cover, push in on the tabs at the ends of the cover and lift.
Fuse Box Diagrams
Engine Compartment Fuse Box
| № | Description |
| 1 | Heated Seats |
| 2 | Grille Guard |
| 3 | 2006-2008: Fuel Pump 2010: Stop Lamp (H3T Only) |
| 4 | Roof Lamp |
| 5 | Battery Ignition Switch |
| 6 | Front Wiper |
| 7 | 2006: Spare 1 2007-2010: Regulated Voltage Control Power |
| 8 | Power Locks |
| 9 | Sunroof, Front Washer Pump |
| 10 | Accessories (SPO) |
| 11 | 2006: Not Used 2007-2008: Air Compressor 2010: Not Used |
| 12 | Transfer Case Control Module |
| 13 | 2006-2008: Radio, Heating, Ventilation, Air Conditioning Display. 2010: Radio |
| 14 | Body Control Module |
| 15 | Rear Wiper Motor |
| 16 | Rear Wiper Pump Switch |
| 17 | 2006: Spare 2 2007-2008: Air Injection Reactor (AIR) Solenoid 2010: Air Injection Reactor (AIR) Pump Relay/ Transmission Control Module (TCM) (V8 Only) |
| 18 | 2006-2008: Spare 6 2010: Rear Vision Camera |
| 19 | Cluster |
| 20 | Rear Turn Signal, Hazard Signal |
| 21 | Powertrain Control Module 1 |
| 22 | Mass Air Flow Sensor, Purge Solenoid |
| 23 | Injector |
| 24 | Fog Lamp |
| 25 | Powertrain Control Module B |
| 26 | 2006-2007: Spare 4 2008-2010: Transmission Control Module (TCM) |
| 27 | Airbags |
| 28 | 2006-2008: Back-up Lamps 2010: Not Used |
| 29 | Anti-lock Brakes, StabiliTrak |
| 30 | Rear Window Defogger |
| 31 | Canister Vent |
| 32 | 2006: Spare 5 2007-2010: Regulated Voltage Control VSense+ |
| 33 | Ignition 1 |
| 34 | Transmission |
| 35 | Cruise, Inside Rearview Mirror |
| 36 | Horn |
| 37 | Driver’s Side Rear Park Lamp |
| 38 | Amplifier |
| 39 | 2006: Spare 7 2007-2008: Reduced Intensity Low-Beam Daytime Running Lamps 2010: Daytime Running Lamps |
| 40 | Passenger’s Side Headlamp |
| 41 | Driver’s Side Headlamp |
| 42 | Trailer Back-Up Lamp |
| 43 | Front Park Lamps |
| 44 | 2006: Not Used 2007-2010: Air Injection Reactor (AIR) Solenoid |
| 45 | Auxiliary Power 2/ Cigarette Lighter |
| 46 | Electronic Throttle Control |
| 47 | Oxygen Sensor |
| 48 | Air Conditioning Clutch |
| 49 | 2006-2008: Passenger’s Side Rear Park Lamp 2010: Rear Park Lamp |
| 50 | 2006-2007: XM Satellite Radio 2008: Spare 2010: Stop Lamp |
| 51 | Auxiliary Power 1/ Cigarette Lighter |
| 52 | StabiliTrak , Anti-lock Brakes |
| 53 | 2006-2008: Power Heater Switch 2010: Power Heated Seat, Belt Switch |
| 54 | 2006-2008: Stop 2010: Fuel System Control Module (FSCM) |
| 55 | Trailer Parking Lamps |
| 56 | 2006-2008: Front Turn Signal, Hazard Signal 2010: Front Turn Signal, Hazard Signal, Courtesy Mirror |
| 57 | Power Sunroof |
| 58 | Transfer Case Control Module Switch |
| 59 | Climate Control |
| 60 | 2006-2008: Spare 8 2010: Back‐Up Lamp |
| 61 | Power Seats |
| 62 | Air Injection Reactor (AIR) Pump |
| 63 | Passenger’s Side Power Window |
| 64 | Anti-lock Brakes, StabiliTrak 2 Motor |
| 67 | Anti-lock Brakes, StabiliTrak 1 Solenoid |
| 68 | Driver’s Side Power Window |
| 82 | Climate Control Fan |
| 83 | Electronic Brake Controller |
| 84 | Trailer B+ Fuse |
| 85 | Starter |
| 91 | Generator Megafuse |
| Relay | |
| 66 | 2006-2008: Fuel Pump 2010: Stop Lamp (H3T Only) |
| 69 | Fog Lamp |
| 70 | High, Low Beam Headlamps |
| 71 | Rear Defogger |
| 72 | Windshield Wiper On/Off |
| 73 | Windshield Wiper High/Low |
| 74 | Horn |
| 75 | Headlamp |
| 76 | Air Conditioning Clutch |
| 77 | 2006-2008: Powertrain Control Module 2010: Powertrain Control Module (Starter) |
| 78 | Run, Crank |
| 79 | 2006: Spare 1 2007-2008: Reduced Intensity Low-Beam Daytime Running Lamps 2010: Daytime Running Lamps |
| 80 | 2006: Not Used 2007-2008: Air Injection Reactor (AIR) Solenoid |
| 81 | 2006-2008: Powertrain (Starter) 2010: Powertrain |
| 86 | 2006-2008: Spare 2 2010: Back-up |
| 87 | 2006-2008: Heating, Ventilation, Air Conditioning 2010: Ignition 3 (Heating, Ventilation, Air Conditioning) |
| 88 | Retained Accessory Power |
| 89 | Park Lamp |
| Diode | |
| 65 | Wiper Diode |
| 90 | Air Conditioning Clutch Diode |
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