Cadillac STS (2007) – fuse box diagram
Year of production: 2007
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, Variable Intake (V6), Purge Solenoid (V6), Camshaft Phasers (V6) |
| R REAR | Passenger’s Side Rear Fuse Block |
| WPR SW | Wiper/Washer Switch |
| FOG LAMP | Fog Lamps |
| OUTLET | Rear Accessory Power 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 |
| RAIN SSR | Rain Sensor, Headlamp Washer, Tire Pressure Monitor |
| CCP | Climate Control |
| SMT BM-OPT | IntelliBeam™ Relay (If Equipped) |
| 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 | Driver’s Side Park Lamp, Driver’s Side 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, Steering Column Switch |
| V8 ECM | V8 Engine Control Module (ECM), Evap. Solenoid, Vacuum Bypass |
| 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 Control Module (TCM), Instrument Panel, Engine Control |
| SPARE | Spare |
| MAF | Mass Air Flow Sensor (V6) |
| HIGH FAN | Cooling Fan – High Speed |
| LOW FAN | Cooling Fan – Low Speed |
| RT PARK | Passenger’s Side Park Lamp, Right Taillamp |
| HORN | Horn |
| LT HI BEAM | Driver’s Side Headlamp High-Beam |
| LT LOW BEAM | Driver’s Side Headlamp Low-Beam |
| RT LOW BEAM | Passenger’s Side Headlamp Low-Beam |
| RT HI BEAM | Right Headlamp High-Beam |
| HFV6 ECM | High Feature V6 Engine Control Module (ECM), Mass Air Flow Sensor (MAF) (V8) |
| HDLP WASH RELAY JUMPER -OPT | Headlamp Washer |
| Relays | Usage |
| HDLP WASH RELAY JUMPER -OPT | Headlamp Washer |
| STARTER RELAY MINI | Starter |
| SPARE | Spare |
| FOG LAMP RELAY MICRO | Fog Lamps |
| CMP CLU RELAY MICRO | Air Conditioning Compressor Clutch |
| BLOWER RELAY MINI | Front Blower Motor |
| POWERTRAIN RELAY MICRO | Engine Controls |
| RUN/CRANK RELAY MICRO | Ignition 1, Starter, Washer Nozzle, Air Quality, Anti-lock Brake System, Climate Control Panel, Transmission Control Module, Instrument Panel Cluster, Mass Airflow Sensor, Engine Control Module |
| LOW SPEED FAN RELAY MINI | Cooling Fan Low Speed |
| ACCESSORY RELAY MINI | Ignition 3, Rain Sensor, Headlamp Washer, Windshield Wiper/Washer Module |
| PARK LAMP RELAY MICRO | Parking Lamps, Instrument Panel Dimming, Rear License Plate Lamps |
| HIGH BEAM RELAY MICRO | Headlamp High-Beam |
| LOW BEAM RELAY/HID MINI-OPT | Low-Beam/High Intensity Discharge |
| 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) |
| Harness Connection | Usage |
| ENG W/H | Engine Harness Connection |
| BODY W/H | Body Harness Connection |
| BODY W/H | Body Harness Connection |
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 |
| AMP | Amplifier |
| INTERCOOLER PUMP (OPT) | Intercooler Pump (Option) |
| THEFT/SHIFTER | Theft Sensors, Auto Shifter |
| MR-RTD MOD (OPT) | MR-CVRTD Suspension Module (Option) |
| REAR DR MOD | Rear Door Modules |
| ELC SOL (OPT) | Automatic Level Control, Exhaust Solenoid (Option) |
| DRIVER DR MOD | Driver Door Module, Front Door SubWoofers (Option) |
| 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 (Option) |
| DPM | Memory Seat, Lumbar |
| TRUNK DR VALET | Trunk Release, Valet Lockout Switch |
| REVERSE LAMP | Reverse Lamps, Rear Parking Aid, Inside Rearview Mirror |
| AIR BAG | Airbag |
| POSITION LAMPS (OPT) | Rear Taillamps |
| ELC RELAY (OPT) | Automatic Level Control (Option) |
| Relays | Usage |
| INTERCOOLER PUMP MICRO (OPT) | Intercooler Pump (Option) |
| ELC RELAY (OPT) | Automatic Level Control 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, Inside Rearview Mirror |
| 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 |
| Diode | Usage |
| SPARE | Spare |
| Joint Connector | Usage |
| JOINT CONNECTOR | Splice Pack (Green) |
Passenger’s Side
| Fuses | Usage |
| SPARE | Spare |
| 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 Rear Integration Module |
| RUN/CRANK | Ignition 1, Fog Lamps, Compressor Clutch, Engine Run/Crank Relays |
| HTD STG/CLM | Heated Steering Wheel, Column Lock Module |
| 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/ DIFF PUMP (OPT) |
After Boil, Rear Differential Cooling Pump |
| RIM | Ignition to Rear Integration Module |
| 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 |
| Diodes | Usage |
| TRUNK DIODE | Trunk Release |
| Joint Connector | Usage |
| JOINT CONNECTOR | Splice Pack (Blue) |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.