Pontiac Montana (2003 – 2005) – fuse box diagram
Year of production: 2003, 2004, 2005
Instrument Panel Fuse Block
The instrument panel fuse block is located at the right end of the instrument panel, on the passenger’s side of the vehicle.
| Fuses | Usage |
| SWC BACKLIGHT | Steering Wheel Radio Control Switches (Illumination) |
| PCM/PASS KEY/CLUSTER | Instrument Cluster to PRNDL Indicators |
| PWR MIRROR | Power Remote Control Mirror Switch |
| CRUISE | Cruise Control Module, Switch and Release Switch |
| Blank | Not Used |
| PCM/CRANK | Powertrain Control Module (PCM), Ignition Crank |
| PASS KEY | PASS-Key ® III System |
| PWR LOCK | Power Door Locks |
| HTD MIRROR | Heated Mirrors |
| RH T/LP | Not Used |
| RR FOG LP | Not Used |
| CIGAR/DIC/ APO FRT | Cigarette Lighter, DIC, Front Auxiliary Power Outlets, Data Link |
| T/SIG | Turn Signal Switch |
| PWR QTR VENT | Interior Lamp and Multifunction Switch (Power Vent Switch), Auto Leve |
| FRT/WPR/ WSHR | Windshield Wiper/Washer Motor and Switch |
| HAZARD | Hazard Switch |
| RR PWR SCKT | Rear Electric Accessory Plug Housing |
| DRL | Daytime Running Lamp Control Module |
| LH T/LP | Not Used |
| RR DEFOG/ HTD MIRROR | Rear Window Defogger Relay, Heated Mirrors |
| ON STAR | OnStar® |
| SIR | Inflatable Restraint Control Module |
| HVAC BLOWER | Heater-A/C Control |
| MALL CLUSTER | Instrument Cluster, Body Control Module, Electronic Level Control (ELC) Sensor and Relay, Theft, Door Ajar |
| STOP LAMP | Stoplamp Switch |
| CLUSTER BATT | Module/Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM) |
| ENHANCED EVAP/AWD | Evaporative Emissions (EVAP) Canister Vent Solenoid Valve, All-Wheel Drive (AWD) |
| Blank | Not Used |
| ELC/TRAILER | ELC Air Compressor and ELC Height Sensor, Trailer Harness |
| CTSY LAMP | Courtesy Lamp |
| IGN 1 | BCM, Electronic Brake Control Indicator Lamp Driver Module, Instrument Panel Cluster, Rear Side Door Actuator Control Module, Rear Windows, Rear Parking Aid |
| RR HVAC TEMP CONT | Rear HVAC-A/C Control |
| RR WPR/ WSHR | Rear Window Wiper Motor, Rear Window Wiper/Washer and Multifunction Switch (Rear Window Wiper/Washer Switch) |
| LH HEADLP LOW | Not Used |
| LH HEADLP HIGH | Not Used |
| Blank | Not Used |
| Blank | Not Used |
| Blank | Not Used |
| RAP RELAY | Retained Accessory Power (RAP) Relay |
| Blank | Not Used |
| HVAC/DIC/ DRL/ HEATED SEAT | Air Inlet Actuator, DIC Display, DRL Control Module, Heater-A/C Control, Temperature Door Actuator (Front) and Rear Window Defogger Relay |
| BCM PRGRAM | BCM Programming |
| RH HEAD LP LOW | Not Used |
| RH HEAD LP HIGH | Not Used |
| PCM/ABS | IGN MAIN Relay and PCM, Electronic Brake Control Module |
| Relays | Usage |
| HEADLAMP | Daytime Running Lamps (DRL) Control Module, Headlamp and Instrument Panel Dimmer Switch |
| PWR SLD DR | Power Sliding Door |
| PWR WDO | Front Power Windows |
| PWR/HEATED SEAT PSD | Six-Way Power Seats and Rear Side Door Actuator Motor |
| FRT HVAC HI BLWR | Blower Motor Hi Speed Relay Module |
Underhood Fuse Block
This fuse block is located in the engine compartment, in front of the windshield washer fluid reservoir.
| Fuses | Usage |
| 1 | Coolant Fans |
| 2 | Not Used |
| 3 | Circuit Breakers: Front Comfort Controls Hi Blower, and Headlamp Fuses (Instrument Panel): Hazard and Stoplamp, PASS-Key® |
| 4 | Circuit Breaker: Power Seat and Power Sliding Door. Fuses (Instrument Panel): Electronic Level Control and Rear Defogger, Trailer, Fog Lamps |
| 5 | Ignition Switch to Fuses (Instrument Panel): ABS/TCS Ignition, Cruise, DRL, Electronic PRNDL, Ignition 1, PSD, Air Bag, Turn Signal and Powertrain Control Module [IGN MAIN Relay (Underhood Fuse Block: A/C Clutch, Electronic Ignition, Ignition 1-U/H, INJ, TCC)] |
| 6 | Coolant Fans |
| 7 | Fuses (Instrument Panel): ABS Module Battery, Cigarette Lighter, Courtesy Lamps, Front Power Socket, Power Locks, Power Mirrors and Right Rear Power Socket, OnStar, RAP |
| 8 | Ignition Switch to Fuses (I/P): Body Control Module Program, Front Comfort Controls Low/Medium Blower, Front Wiper/Washer, HVAC/DRL, MALL/Radio/DIC, Power Quarter Vent, Rear HVAC, Rear Wiper/Washer. SWC Accessory and Power Window Circuit Breaker, RAP |
| 18 | Fuel Injectors 1–6 |
| 19 | Not Used |
| 20 | Not Used |
| 21 | Evaporative Emissions (EVAP) Canister Purge Valve, Heated Oxygen Sensors 1 and 2, Mass Air Flow (MAF) Sensor |
| 22 | Not Used |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Ignition Control Module (ICM) |
| 26 | Not Used |
| 27 | Transaxle Range Switch to Back-up Lamps |
| 28 | A/C Clutch Relay to A/C Compressor Clutch Oil |
| 29 | Driver Information Display, Heater A/C Control, Radio, Rear (LH and RH) Side Door Actuator Control Motor, Remote Control Door Lock Receiver (RCDLR), Security Indicator Lamp and Theft-Deterrent Shock Sensor |
| 30 | Generator |
| 31 | Automatic Transaxle (Torque Converter Clutch Solenoids) Stoplamp Switch to Powertrain Control Module |
| 32 | Fuel Pump Relay |
| 33 | Powertrain Control Module |
| 34 | Not Used |
| 35 | Fog Lamp Relay |
| 36 | Horn Relay |
| 37 | Daytime Running Lamps (DRL) Control Module, Headlamps and Instrument Panel Dimmer Switch Theft-Deterrent Relay to Headlamps |
| 38 | Not Used |
| 39 | AIR |
| 40 | Mini Fuse Puller |
 |
Air Conditioning Clutch Diode |
| Relays | Usage |
| 9 | Right Fan 1, Left Fan 2 |
| 10 | Left Fan 2 |
| 11 | Fuses: A/C Clutch, Ignition 1-U/H, Electronic Ignition, TCC, Injectors |
| 12 | Right Fan 1, Left Fan 2 |
| 13 | A/C Clutch |
| 14 | Fuel Pump |
| 15 | Not Used |
| 16 | Horn |
| 17 | Left Fog Lamp, Right Fog Lamp, Fog Lamp Indicator |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.