Cadillac STS 2009 Fuse Box Info
Passenger compartment fuse box location:
The fuse boxes are located under the rear seat of the vehicle.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box (Driver’s Side):
| Fuse/Relay Name | Functions |
| AMP | Amplifier |
| INCLR PUMP | Inner Cooler Pump (Option) |
| THEFT/SHFT | Theft Sensors, Auto Shifter, Power Sounder |
| MRTD MDL | Magnetic Ride Control Module (Option) |
| REAR DR MDL | Rear Door Modules |
| ELC EXH | Electronic Level Control, Exhaust Solenoid (Option) |
| DDM | Driver Door Module, Front Door SubWoofers (Option) |
| TV/VICS/SCM | Infotainment (Export Only), Supervisory Control Module (Option) |
| REAR HTD/SEATS | Rear Heated Seats |
| SPARE | Spare |
| SPARE | Spare |
| IGN3 | Front Passenger Heated Seat, Auto Shifter, Occupant Protection, Electronic Tension Reducer for Seatbelt |
| REAR SHLF SPKR | Rear Shelf Speaker (Option) |
| MSM | Memory Seat Module Lumbar |
| TRUNK RELSE SW |
Trunk Release, Valet Lockout Switch |
| BCK/UP LAMP | Reverse Lamps, Rear Parking Aid, Inside Rearview Mirrors |
| AIR BAG/BATT | Airbag |
| POS LAMPS | Rear Taillamps |
| ELC CMPRSR | Automatic Level Control (Option) |
| INCLR PUMP | Intercooler Pump (Option) |
| ELC CMPRSR | Electronic Level Control, Compressor (Option) |
| LT POS | Left Rear Taillamp, Position Lamps (Option) |
| RT POS | Right Rear Taillamp, Position Lamps (Option) |
| RUN | Ignition 3 |
| STDBY LAMP | Rear Taillamps, Position Lamps (Option) |
| TRUNK RELSE | Trunk Release Motor |
| BCK/UP LAMP | Reverse Lamps, Rear Parking Aid, Inside Rearview Mirror |
| PWR SEATS | Power Seats |
| SPARE | Spare |
| JC | Splice Pack (Green) |
Passenger compartment fuse box (Passenger’s Side):
| Fuse/Relay Name | Functions |
| AIRBAG/IGN | Sensing and Diagnostic Monitor, Automatic Occupant Sensor, Passenger Supplemental Inflatable Restraint |
| CNSTR/VENT | Canister Vent Solenoid |
| DIFF PUMP | Rear Differential Pump |
| FRT PDM | Front Passenger Door Module, Right Power Subwoofer |
| FUEL PUMP | Fuel Pump |
| HTD STR | Heated Steering Wheel |
| RF HTD/SEAT/XM |
Front Passenger Heated Seat, S-Band™ Antenna |
| RDO/ONSTAR | Radio, OnStar® |
| INT LAMP | Interior Lamps |
| LT TRN/LDW | Left Turn Signal, Lane Departure Warning (Option) |
| REAR DEFOG | Rear Defogger |
| REAR/FOG | Rear Fog Lamps (Option) |
| RIM | Rear Integration Module |
| RIM /RPA / ISRVM /CLM | Rear Integration Module, Rear Parking Aid, Inside Rearview Mirror, Column Lock Module, Power Sounder, Active Front Steering (AFS), Supervisory Control Module |
| RUN/CRNK | UHBEC Run, CRNK Relay Coil, Rear Fog Lamp Relay Coil |
| S/ROOF | Sun Roof Module (Option) |
| SPARE | Spare |
| STOP LAMPS | Stop Lamps |
| RT TRN/SZBA | Right Turn Signal, Side Blind Zone Alert (Option) |
| DIFF PUMP | Rear Differential Pump (Option) |
| FUEL PUMP | Fuel Pump |
| INT LAMP | Interior Lamps |
| REAR DEFOG | Rear Defogger |
| REAR/FOG | Rear Fog Lamps (Option) |
| RUN/CRNK | Ignition 1 |
| SPARE | Spare |
| STOP LAMP | Stop Lamp |
| WINDOW MTRS |
Power Window Motors Circuit Breaker |
| TRUNK DIODE | Trunk Release |
| J/C | Splice Pack (Blue) |
Engine compartment fuse box:
| Fuse/Relay Name | Functions |
| ABS MTR | ABS Module - ABS Module - Stabilitrak |
| AFS | Active Front Steering |
| BLWR | Blower Motor |
| FAN 1 | Cooling Fan-Low Speed |
| FAN 2 | Cooling Fan-High Speed |
| LPDB 1 | Driver Side Rear Fuse Block |
| LPDB 2 | Driver Side Rear Fuse Block |
| RPDB 1 | Passenger Side Rear Fuse Block |
| RPDB 2 | Passenger Side Rear Fuse Block |
| SPARE | Spare |
| SPARE | Spare |
| STRTR | Starter |
| A/C CLTCH | Air Conditioning Compressor Clutch |
| ABS | ABS Module-StabiliTrak |
| ABS IGN | Antilock Brake Controller |
| AUX OUTLET | Rear Accessory Power Outlet |
| BRK VAC PUMP |
Brake Vacuum Pump |
| CCP | Climate Control Panel |
| CCP/RLY COILS | Climate Control Panel, Headlamp Level Control, Active Cruise Control, Relay Coils, Starter, Front Blower |
| ECM 1 | Engine Control Module (ECM) |
| ECM/TCM BATT |
ECM, Transmission Control Module (TCM) |
| ECM/TCM IGN | ECM, TCM, Instrument Panel Cluster |
| EKM/I/P MDL | Easy Key Module (EKM), Instrument Panel Module (I/P MDL) |
| EVEN COILS | Even Ignition Coils, Even Fuel Injectors |
| FOG LAMP | Front Fog Lamps |
| FRT PWR OUTLET |
Front Accessory Power Outlet |
| FUEL COOL | Fuel Cooling |
| HORN | Horn |
| HTD WASH/AQS |
Heated Headlamp Washer, Air Quality Sensor |
| HUD | Heads-Up Display, Steering Column Switch |
| I/BEAM | IntelliBeam Relay |
| I/P MDL/ALDL | Instrument Panel Module, Assembly Line Data Link Connector |
| LIC DIM | License Plate, Instrument Panel Dimming |
| LT HI BEAM | Driver Side High Beam Headlamp |
| LT LO BEAM | Driver Side Low Beam Headlamp |
| LT PRK | Driver Side Park Lamp/Driver Side Taillamp |
| ODD COILS | Odd Ignition Coils, Odd Fuel Injectors |
| POST O2 SNSR |
Post Oxygen Sensor |
| PRE O2 SNSR | Pre Oxygen Sensor, CAM Sensors |
| RAIN SNSR/TPM |
Rain Sensor, Relay Coil: Headlamp Wash |
| RT HI BEAM | Passenger Side High Beam Headlamp |
| RT LO BEAM | Passenger Side Low Beam Headlamp |
| RT PRK | Passenger Side Park Lamp, Passenger Side Taillamp |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| V/CHK | Instrument Panel Module-Voltage Check |
| WPR | Wipe/Wash Module Assembly |
| WPR SW/VICS | Rain Sensor, Wiper Switch |
| A/C CMPRSR CLTCH |
Air Conditioning Compressor Clutch |
| ACCY | Accessory Rain Sensor, Headlamp Washer Relay Coil, Windshield Wiper/Washer Module |
| BRK VAC PUMP |
Brake Vacuum Pump |
| FAN S/P | Cooling Fan Series/Parallel |
| FOG LAMP | Fog Lamps |
| FRT BLWR | Front Blower Motor |
| FUEL COOL | Fuel Cooling Pump |
| HI BEAM | High Beam Headlamp |
| HI FAN SPD | Cooling Fan High Speed |
| HORN | Horn |
| LO FAN SPD | Cooling Fan Low Speed |
| LOW BEAM W/O HID/HID | Low Beam Headlamp, High Intensity Discharge (HID) |
| PRK LAMP | Parking Lamps, Instrument Panel Dimming, Rear License Plate Lamps |
| PWR/TRN | Engine Controls |
| RUN CRNK | Heated Washer Nozzle, Air Quality, Antilock Brake System, Climate Control Panel, TCM, ECM, Instrument Panel Cluster |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| STRTR | Starter |
| WPR HI | Windshield Wiper High Speed |
| HDLP WASH | Headlamp Washer Motor (Circuit Breaker) |
