Fuse Diagrams: 2010 Cadillac STS Fuses and Relay Guide
The 2010 Cadillac STS circuit diagrams show you what the fuses and relays in the car do and how they work. These diagrams are very important for knowing the electrical parts and making sure that different systems work right. The fuses and relays in the Cadillac STS are very important because they keep the electrical systems safe from damage caused by overloads or short circuits. People who own cars can easily find specific fuses, understand what they do, and fix any electrical problems by using these images. Understanding the fuse diagrams is important for keeping the 2010 Cadillac STS’s electrical system in good shape and making sure it runs at its best.
2023 Cadillac CT4 Specs, Price, Features, Mileage and Review
Electrical System
Add-On Electrical Equipment
Notice: Do not add anything electrical to the vehicle unless you check with your dealer/retailer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle’s warranty. Some add-on electrical equipment can keep other components from working as they should.
Add-on equipment can drain the vehicle battery, even if the vehicle is not operating.
The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing Your Airbag-Equipped Vehicle on pages 2‑66 and Adding Equipment to Your Airbag-Equipped Vehicle on pages 2‑66.
Headlamp Wiring
The headlamp wiring is protected by fuses in the fuse block. An electrical overload will cause the lamps to turn off. If this happens, have the headlamp wiring checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internal circuit breaker. If the wiper motor overheats due to heavy snow, the wipers will stop until the motor cools and will then restart.
Power Windows and Other Power Options
Circuit breakers in the fuse block protect the power windows and other power accessories. When the current load is too heavy, the circuit breaker opens and closes, protecting the circuit until the problem is fixed or goes away.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses, circuit breakers, and fusible thermal links. This greatly reduces the chance of fires caused by electrical problems.
Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. Replace the fuse as soon as you can.
Underhood Fuse Block
The underhood fuse block is located in the front of the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview on pages 6‑13 for more information on the location and removal procedure for the front compartment underhood sights shields.
To access the fuses, push in the tabs located on each side of the fuse block cover, then lift the cover off.
Notice: Spilling liquid on any electrical components on the vehicle may damage it. Always keep the covers on any electrical component.
| Fuses JCase | Usage |
| 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 |
| Fuses JCase | Usage |
| SPARE | Spare |
| SPARE | Spare |
| STRTR | Starter |
| Fuses Mini | Usage |
| A/C CLUTCH | 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 |
| Fuses Mini | Usage |
| 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 |
| Fuses Mini | Usage |
| 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 |
| Fuses Mini | Usage |
| V/CHK | Instrument Panel Module-Voltage Check |
| WPR | Wipe/Wash Module Assembly |
| WPR SW/VICS | Rain Sensor, Wiper Switch |
| Relays | Usage |
| A/C CMPRSR CLUTCH | 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 |
| Relays | Usage |
| 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 |
| Circuit Breakers | Usage |
| HDLP WASH | Headlamp Washer Motor (Circuit Breaker) |
Rear Underseat Fuse Block
Removing the Rear Seat Cushion
Notice: If you touch the exposed wires with the metal on the seat cushion, you could cause a short that could damage the battery and or wires. Avoid contact between the rear seat and the fuse center whenever you remove or reinstall the rear seat. Do not remove covers from any of the covered parts, and do not store anything under the seats.
To remove the rear seat cushion, do the following:
- Pull up on the front of the cushion to release the front hooks.
- Pull the cushion up and out toward the front of the vehicle.
To reinstall the rear seat cushion, do the following:
WARNING:
A safety belt that is not properly routed through the seat cushion or is twisted will not provide the protection needed in a crash. If the safety belt has not been routed through the seat cushion at all, it will not be there to work for the next passenger. The person sitting in that position could be badly injured. After reinstalling the seat cushion, always check to be sure that the safety belts are properly routed and are not twisted.
- Buckle the center passenger position safety belt, then route the safety belts through the proper slots in the seat cushion. Do not let the safety belts get twisted.
- Slide the rear of the cushion up and under the seatback so the rear-locating guides hook into the wire loops on the back frame.
- With the seat cushion lowered, push rearward and then press down on the seat cushion until the spring locks on both ends engage.
- Check to make sure the safety belts are properly routed and that no portion of any safety belt is trapped under the seat. Also, make sure the seat cushion is secured.
Rear Underseat Fuse Block
There is a fuse block located under the rear seat on the driver’s side and passenger side of the vehicle. The rear seat cushion must be removed to access the fuse blocks. See “Removing the Rear Seat Cushion” listed previously in this section. To access the fuses, push in the two tabs, then lift the cover off.
The vehicle may not have all the fuses listed below.
Driver’s Side
| Fuses | Usage |
| AMP | Amplifier |
| SPARE | Spare |
| THEFT/SHORT | 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 |
| Fuses | Usage |
| 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 RELEASE 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) |
| Relays | Usage |
| SPARE | Spare |
| 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 RELEASE | Trunk Release Motor |
| BCK/UP LAMP | Reverse Lamps, Rear Parking Aid, Inside Rearview Mirror |
| Circuit Breakers | Usage |
| PWR SEATS | Power Seats |
| Diodes | Usage |
| SPARE | Spare |
| Joint Connector | Usage |
| J/C | Splice Pack (Green) |
Passenger’s Side
| Fuses | Usage |
|
AIRBAG/IGN |
Sensing and Diagnostic Monitor, Automatic Occupant Sensor, Passenger Supplemental Inflatable Restraint |
| CNSTR/VENT | Canister Vent Solenoid |
| SPARE | Spare |
| 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 |
| Fuses | Usage |
| 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) |
| Relays | Usage |
| SPARE | Spare |
| 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 |
| Circuit Breakers | Usage |
| WINDOW MTRS | Power Window Motors Circuit Breaker |
| Diodes | Usage |
| TRUNK DIODE | Trunk Release |
| Joint Connector | Usage |
| J/C | Splice Pack (Blue) |
How to Replace Fuse in 2010 Cadillac STS
Materials Needed:
- Replacement fuse (ensure it has the same rating as the one you’re replacing)
- Fuse puller tool or a pair of needle-nose pliers (optional but helpful)
- Flashlight (optional, for better visibility)
Instructions:
- Locate the Fuse Box: The fuse box in the 2010 Cadillac STS is typically located in one of three places: under the hood, under the rear seat, or on the side of the dashboard.
- Identify the Faulty Fuse: Once you locate the fuse box, open the cover. Inside, you’ll find a diagram or chart that indicates which fuse corresponds to which component. Use this diagram to identify the fuse that needs replacement.
- Inspect the Fuse: Before pulling out the fuse, visually inspect it to confirm it’s blown. A blown fuse will have a broken filament or appear discolored compared to a functional fuse.
- Prepare to Replace the Fuse: If your fuse box comes with a fuse puller tool, use it to grip and pull out the fuse. Alternatively, you can use a pair of needle-nose pliers. Ensure the vehicle’s ignition is turned off before proceeding.
- Remove the Fuse: Grip the fuse firmly with the puller tool or pliers and pull it straight out of its slot. Avoid using excessive force to prevent damaging the fuse box or surrounding components.
- Install the Replacement Fuse: Take the new fuse and carefully insert it into the empty slot. Make sure it fits securely but don’t force it. Double-check that the replacement fuse has the same amp rating as the original one.
- Close the Fuse Box: Once you’ve replaced the fuse, securely close the fuse box cover.
- Test the Component: Turn on the ignition and test the component associated with the replaced fuse to ensure it’s functioning properly.
Tips:
- Safety First: Always disconnect the power source before handling fuses to avoid electric shock or damage to the vehicle’s electrical system.
- Use the Right Fuse: Ensure the replacement fuse has the same amp rating as the original one. Using a fuse with a higher amp rating can lead to electrical damage or even a fire hazard.
- Keep Spare Fuses: It’s a good idea to keep a variety of spare fuses in your vehicle in case of emergencies.
FAQs
A 2010 Cadillac STS typically has two fuse boxes—one located in the engine compartment and another inside the vehicle’s cabin.
The fuse box in the engine compartment of a 2010 Cadillac STS is usually found near the battery, while the interior fuse box is often located on the driver’s side, beneath the dashboard.
Relays in the fuse system of a 2010 Cadillac STS help to control high-current circuits, such as those for the headlights, cooling fans, and fuel pump.
It’s important to use the correct type and amperage of fuse specified for each circuit in a 2010 Cadillac STS to avoid electrical issues or damage to the vehicle.
Fuses in a 2010 Cadillac STS often protect various electrical components such as the headlights, power windows, air conditioning system, and stereo.
Yes, a blown fuse in a 2010 Cadillac STS can lead to other electrical problems by interrupting the circuit and preventing power from reaching certain components.
While fuse-related issues can vary, some common problems in the 2010 Cadillac STS include blown fuses for the power windows, interior lights, or auxiliary power outlets.
Yes, water damage can potentially affect the fuse box in a 2010 Cadillac STS, leading to corrosion or short circuits. It’s essential to keep the fuse box and its surroundings dry to prevent such issues.
The time it takes to replace a fuse in a 2010 Cadillac STS can vary depending on the location of the fuse and the accessibility of the fuse box, but it generally only takes a few minutes.
Warning signs of a potential fuse-related issue in a 2010 Cadillac STS may include malfunctioning electrical components, intermittent operation, or warning lights on the dashboard.
Useful Links
2023 Cadillac CT4 Specs, Price, Features, Mileage and Review
Instrument Cluster Guide: 2010 Cadillac STS Dashboard Explained