Cadillac STS (2005 – 2006) – fuse box diagram
Year of production: 2005, 2006
Underhood Fuse Block
The underhood fuse block is located in the front of the engine compartment on the passenger’s side of the vehicle.
| Fuses | Usage |
| BLOWER | Blower Motor |
| R REAR | Passenger’s Side Rear Fuse Block |
| I/P OUTLET | Front Auxiliary Outlet |
| CCP | Climate Control, Headlamp Leveling |
| PRE 02/CAM | Oxygen Sensor, CAM Phasers |
| ENG W/H | Engine W/H |
| R REAR | Passenger’s Side Rear Fuse Block |
| WPR SW | Wiper/Washer Switch |
| BODY W/H | Body W/H |
| FOG LAMP | Fog Lamps |
| OUTLET | Rear Auxiliary Outlet |
| EVEN COILS | Even Ignition Coils, Even Fuel Injectors |
| L REAR | Left Rear Fuse Block |
| WPR MOD | Wiper Module |
| POST 02 | Oxygen Sensor |
| COMP CLTCH | Air Conditioner Compressor Clutch |
| STARTER | Starter Solenoid |
| ABS | Anti-Lock Brake Pump |
| L REAR | Driver’s Side Rear Fuse Block |
| BODY W/H | Body W/H |
| RAIN SSR | Rain Sensor, Headlamp Washer, Tire Pressure Monitor |
| CCP | Climate Control |
| SMT BM-OPT | Smart Beam Relay (Option) |
| EXT LIGHTS | Low Beam Relay, High Beam Relay, Park Lamp Relay |
| VOLT CHECK | Instrument Panel Module |
| ECM/TCM | Engine Control Module, Transmission Control Module, Easy Key Module, Instrument Panel Cluster |
| SPARE | Spare |
| SPARE | Spare |
| LT PARK | Left Park Lamp, Left Taillamp |
| LIC DIMMING | License Plate, Instrument Panel Dimming |
| IPM ALDL | Instrument Panel Module Assembly Line Data Link Connector |
| HUD | Heads-Up Display, Column Lock Module |
| V8 ECM | V8 ECM, Evap Solenoid |
| ABS | Anti-Lock Brake Controller |
| STR RLY | Starter Relay |
| WASH NOZ/AQS | Heated Washer Nozzles, Air Quality Sensor™ |
| ODD COILS | Odd Ignition Coils, Odd Fuel Injectors |
| TCM IPC | Transmission, Instrument Panel, Engine Control |
| SPARE | Spare |
| MAF | Mass Air Flow Sensor |
| HIGH FAN | Cooling Fan – High Speed |
| LOW FAN | Cooling Fan – Low Speed |
| RT PARK | Right Park Lamp, Right Taillamp |
| HORN | Horn |
| LT HI BEAM | Left Headlamp High Beam |
| LT LOW BEAM | Left Headlamp Low Beam |
| RT LOW BEAM | Right Headlamp Low Beam |
| RT HI BEAM | Right Headlamp High Beam |
| HFV6 ECM | High Feature V6 Engine Control Module |
| HDLP WASH RELAY JUMPER -OPT | Headlamp Washer |
| STARTER RELAY MINI | Starter |
| SPARE | Spare |
| FOG LAMP RELAY MICRO | Fog Lamps |
| CMP CLU RELAY MICRO | A/C Compressor Clutch |
| BLOWER RELAY MINI | Front Blower Motor |
| POWERTRAIN RELAY MICRO | Engine Controls |
| RUN/CRANK RELAY MICRO | Ignition 1 |
| LOW SPEED FAN RELAY MINI | Cooling Fan Low Speed |
| ACCESSORY RELAY MINI | Ignition 3 |
| PARK LAMP RELAY MICRO | Parking Lamps |
| Relays | Usage |
| HIGH BEAM RELAY MICRO | High Beams |
| LOW BEAM RELAY/HID MINI-OPT | Low Beam/HID |
| HIGH SPEED FAN RELAY MINI | Cooling Fan High Speed |
| S/P FAN RELAY MINI | Cooling Fan Series/Parallel |
| HORN RELAY MICRO | Horn |
| SPARE | Spare |
| Circuit brakers | Usage |
| HDLP WASH C/B -OPT | Headlamp Washer (Option) |
Rear Underseat Fuse Block
There is a fuse block located under the rear seat on the driver’s side and passenger’s side of the vehicle. The rear seat cushion must be removed to access the fuse blocks.
Driver’s Side
| Fuses | Usage |
| SPARE | Spare |
| AMP | Amplifier |
| SPARE | Spare |
| SPARE | Spare |
| THEFT/SHIFTER | Theft Sensors, Auto Shifter |
| MR-RTD MOD (OPT) | MR-CVRTD Suspension Module (Option) |
| REAR DR MOD | Rear Door Modules |
| ELC SOL (OPT) | Exhaust Solenoid |
| DRIVER DR MOD | Driver Door Module |
| TV/VICS | Infotainment (Export Only) |
| REAR HTD SEATS | Rear Heated Seats |
| SPARE | Spare |
| SPARE | Spare |
| IGN3 | Front Passenger Heated Seat, Auto Shifter, Occupant Protection |
| RR SHLF SPEAKER | Rear Shelf Speaker |
| DPM | Memory Seat, Lumbar |
| TRUNK DR VALET | Trunk Release, Valet |
| REVERSE LAMP | Reverse Lamps, Rear Parking Aid, Inside Rearview Mirror |
| AIR BAG | Airbag |
| POSITION LAMPS (OPT) | Rear Taillamps |
| JOINT CONNECTOR | Joint Connector |
| Relays | Usage |
| ELC RELAY (OPT) | ELC Compressor (Option) |
| L POSITION RELAY MICRO | Left Rear Taillamp, Position Lamps (Option) |
| TRUNK DR REL RELAY MICRO | Trunk Release Motor |
| REV LAMP RELAY MICRO | Reverse Lamps, Rear Parking Aid |
| R POSITION RELAY MICRO | Right Rear Taillamp, Position Lamps (Option) |
| RUN RELAY MICRO | Ignition 3 |
| STNDBY LAMP RLY (OPT) | Rear Taillamps, Position Lamps (Option) |
| Circuit Breakers | Usage |
| SEATS C/B | Power Seat |
Passenger’s Side
| Fuses | Usage |
| SPARE | Spare |
| TRUNK DIODE | Trunk Diode |
| CANISTER VENT | Canister Vent Solenoid |
| RT TURN-RIM | Right Turn Signal |
| SUNROOF (OPT) | Sunroof Module (Option) |
| STOP LAMPS | Stoplamps |
| FUEL PUMP | Fuel Pump |
| RF HTD ST/S-BAND | Front Passenger Heated Seat, S-Band Antenna |
| RADIO/ONSTAR | Radio/OnStar® |
| AIR BAG | Airbags |
| RIM | Battery to RIM |
| RUN/CRANK | Ignition 1 |
| HTD STG/CLM | Heated Steering Wheel |
| REAR DEFOG | Rear Defogger |
| INTERIOR LAMP | Interior Lamps |
| PSG DR MOD | Front Passenger Door Module |
| LT TURN-RIM | Left Turn Signal |
| REAR FOG LAMP (OPT) | Rear Fog Lamps (Option) |
| AFTERBOIL (OPT) | After Boil Pump |
| RIM | Ignition to RIM |
| JOINT CONNECTOR | Joint Connector |
| Relays | Usage |
| SPARE | Spare |
| REAR DEFOG RELAY MINI | Rear Defog |
| FUEL PUMP RELAY MICRO | Fuel Pump |
| REAR FOG LAMP RLY MICRO (OPT) | Rear Fog Lamps (Option) |
| STOP LAMP RELAY MICRO | Stoplamps |
| INT LAMP RELAY MICRO | Interior Lamps |
| RUN/CRANK RELAY MICRO | Ignition 1 |
| AFTERBOIL RELAY MICRO (OPT) | After Boil Pump (Option) |
| Circuit Breakers | Usage |
| WINDOW MTRS C/B | Power Window Motors Circuit Breaker |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.