Buick Regal (2001 – 2003) – fuse box diagram
Year of production: 2001, 2002, 2003
Instrument Panel Fuse Block
Some fuses are located in a fuse block on the passenger’s side of the instrument panel.
| Circuit Breakers | Usage |
| TIRE RESET | Tire Inflation Monitor Reset Button |
| PWR WINDOWS, PWR SUNROOF | Power Windows, Power Sunroof |
| REAR DEFOG | Rear Window Defogger |
| POWER SEATS | Power Seat |
| Blank | Not Used |
| Fuses | Usage |
| PARK LOCK | Ignition Key Solenoid |
| Blank | Not Used |
| Blank | Not Used |
| PCM, BCM, U/H RELAY | Ignition Signal: Hot in Run and Start, Powertrain Control Module, Body Control Module, Underhood Relay |
| RADIO PREM. SOUND | Remote Radio Premium Sound |
| POWER MIRRORS | Power Mirrors |
| Blank | Not Used |
| PANEL DIMMING | Panel Dimming |
| Blank | Not Used |
| IGN 0, CLUSTER, PCM, BCM | Ignition Signal: Hot in Run, Unlock and Start, Cluster, Powertrain Control Module, Body Control Module |
| Blank | Not Used |
| Blank | Not Used |
| Blank | Not Used |
| INADV POWER BUS | |
| DOOR LOCKS | Door Locks |
| TRAP ALERT | Trap Alert |
| TAIL LAMPS, LIC LAMPS | Taillamps, License Lamps |
| RADIO | Radio |
| HEATED MIRROR | Heated Mirrors |
| CRUISE | Cruise Control |
| Blank | Not Used |
| CLUSTER | Instrument Panel Cluster |
| CIGAR LTR | Cigarette Lighter, Auxiliary Power Connection (Power Drop) |
| STOP LAMPS | Stoplamps |
| ONSTAR | OnStar |
| FRT PARK LPS | Parking Lamps |
| POWER DROP | Auxiliary Power Connection (Power Drop): Hot in ACC and Run |
| CRANK SIGNAL, BCM, CLUSTER | Crank Signal, Body Control Module, Cluster, Powertrain Control Module |
| HVAC | Ignition Signal, Heating Ventilation Air Conditioning Control Head |
| BTSI PARK LOCK | Shifter Lock Solenoid |
| AIR BAG | Air Bag |
| BCM PWR | Body Control Module |
| HAZARD | Hazard Flashers |
| LH HEATED SEAT | Driver’s Heated Seat |
| Blank | Not Used |
| BCM ACC | Ignition Signal: Hot in ACC and Run, Body Control Module |
| Blank | Not Used |
| LOW BLOWER | Low Blower |
| ABS | Anti-Lock Brakes |
| TURN SIGNALS, CORN LPS | Turn Signals, Cornering Lamps |
| RADIO, HVAC, RFA, CLUSTER | Radio, Heating Ventilation Air Conditioning Head, Remote Keyless Entry, Cluster |
| HIGH BLOWER | High Blower |
| RH HEATED SEAT | Passenger’s Heated Seat |
| STRG WHL CONT | Audio Steering Wheel Controls |
| WIPER | Wipers |
Underhood Fuse Block
Some fuses and relays are located in the underhood fuse block on the passenger’s side of the vehicle in the engine compartment.
| Maxi Fuses | Usage |
| 1 | Anti-Lock Brake System |
| 2 | Starter Solenoid |
| 3 | Power Seats, Rear Window Defogger, Heated Seats |
| 4 | High Blower, Hazard Flasher, Stoplamps, Power Mirror, Door Locks |
| 5 | Ignition Switch, BTS Shifter Lock Solenoid, Stoplamps, Anti-Lock Brake System, Turn Signals, Cluster, Air Bag, Daytime Running Lamps Module |
| 6 | Cooling Fan |
| 7 | Retained Accessory Power (RAP), Remote Keyless Entry, Data Link, Heating, Ventilation and Air Conditioning Head, Cluster, Radio, Cigarette Lighter |
| 8 | Ignition Switch, Wipers, Radio, Steering Wheel Controls, Body Control Module, Auxiliary Power (Power Drop), Power Windows, Sunroof, Heating Ventilation Air Conditioning Controls, Daytime Running Lamps, Rear Defog Relay |
| Mini Relays | Usage |
| 9 | Cooling Fan 2 |
| 10 | Cooling Fan 3 |
| 11 | Starter Solenoid |
| 12 | Cooling Fan 1 |
| 13 | Ignition Main |
| 14 | Air Pump (Optional) |
| 15 | Not Used |
| 16 | Horn |
| 17 | Fog Lamps |
| 18 | Not Used |
| 19 | Fuel Pump |
| Mini Fuses | Usage |
| 20 | Air Pump (Optional) |
| 21 | Generator |
| 22 | ECM |
| 23 | A/C Compressor Clutch |
| 24 | Cooling Fan |
| 25 | Electronic Ignition |
| 26 | Transaxle |
| 27 | Horn |
| 28 | Fuel Injector |
| 29 | Oxygen Sensor |
| 30 | Engine Emissions |
| 31 | Fog Lamps |
| 32 | Headlamp (Right) |
| 33 | Rear Compartment Release |
| 34 | Parking Lamps |
| 35 | Fuel Pump |
| 36 | Headlamp (Left) |
| 37 | Spare |
| 38 | Spare |
| 39 | Spare |
| 40 | Spare |
| 41 | Spare |
| 42 | Spare |
| 43 | Fuse Puller |
| SYMBOL | Air Conditioner Compressor Clutch Diode |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.