Page Contents:
In this article, you will find information about the fuses of the Cadillac CTS (models 2008, 2009, 2010, and 2011), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Cadillac CTS
The wiring circuits in your vehicle are protected from short circuits by a combination of fuses and circuit breakers. 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. 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.
Caution!
Spilling liquid on any electrical components on your vehicle may damage it. Always keep the covers on any electrical component.
Location of Fuse Boxes
Underhood Fuse Block:
The underhood fuse block is located on the passenger side of the engine compartment. Lift the fuse block cover to access the fuses.
Rear Compartment Fuse Block:
The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.
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.
Fuse Box Diagrams
2008
Underhood Fuse Block
| Fuses | Usage |
|---|---|
| A/C CLTCH | Air Conditioning Clutch |
| ABS | Antilock Braking System (ABS) |
| AFS | Adaptive Forward Lighting System |
| AIRBAG IGN | Airbag Switch |
| AWD | All-Wheel Drive |
| BCM 1 | Body Control Module 1 |
| BCM 2 | Body Control Module 2 |
| BCM 3 | Body Control Module 3 |
| BCM 4 | Body Control Module 4 |
| BCM 5 | Body Control Module 5 |
| BCM 6 | Body Control Module 6 |
| BCM 7 | Body Control Module 7 |
| DISPLY | Display |
| DRL RT | Right Daytime Running Lamp (DRL) |
| DRL/ENG PUMP | Daytime Running Lamps |
| ECM | Engine Control Module (ECM) |
| ECM/TCM IGN | ECM, Transmission Control Module (TCM), Instrument Panel Cluster (IPC), PASS-Key III+ Module |
| EMIS 1 | Emission 1 |
| EMIS2 | Emission 2 |
| EVEN COILS | Even Coils |
| FRTFOG | Front Fog Lamps |
| HDM WASH | Headlamp Driver Module Washer |
| HORN | Horn |
| LO BEAM DRL | Low-Beam DRL |
| LT HI BEAM | Left High-Beam Headlamp |
| LT LO BEAM | Left Low-Beam Headlamp |
| LT LO BEAM | Left Low-Beam Headlamp |
| LTR | Cigarette Lighter |
| MISC IGN | Ignition |
| NAV MTR | Navigation Motor |
| ODD COILS | Odd Coils |
| PED PROT | Not Used |
| PWR MODING | PassKey Module, Body Control Module |
| RT HI BEAM | Right High-Beam Headlamp |
| RT LO BEAM | Right Low-Beam Headlamp |
| RT LO BEAM | Right Low-Beam Headlamp |
| SPARE | Spare |
| SPARE | Spare |
| STR/WHL/ ILLUM | Steering Wheel Illumination |
| TOM BATT | Transmission Control Module Battery |
| TRANS OIL RLY | Transmission Oil Relay |
| WPR | Windshield Wiper |
| WSW PUMP | Windshield Washer Pump |
| ABS MTR | ABS Motor |
| BLWR | Blower |
| BRK VAC PUMP | Brake Vacuum Pump |
| FAN 1 | Cooling Fan 1 |
| FAN 2 | Cooling Fan 2 |
| REAR DEFOG | Rear Defogger |
| SPARE | Spare |
| SPARE | Spare |
| SPARE | Spare |
| STRTR | Starter |
| TRANS PUMP | Transmission Pump |
| WSW/HTR | Windshield Washer Heater |
| A/C CMPRSR CLTCH | Air Conditioning Compressor Clutch |
| DRL (W/O HID) LO BEAM (HID) | Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge) |
| ENG PUMP | Engine Pump |
| FAN S/P | Cooling Fan Series / Parallel |
| FAN 1 | Cooling Fan 1 |
| FAN 2 | Cooling Fan 2 |
| HEAD LAMP WASH | Headlamp Washer |
| HI BEAM | High-Beam Headlamp |
| HORN | Horn |
| IGN 1 | Ignition 1 |
| LO BEAM (W/O HID) LT DRL (HID) | Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge) |
| PWR/TRN | Powertrain |
| REAR DEFOG | Rear Defogger |
| SPARE | Spare |
| STRTR | Starter |
| WPR | Windshield Wiper |
| WPR HI | Windshield Wiper High Speed |
| WSW PUMP | Windshield Washer Pump |
Rear Compartment Fuse Block
| Name | Usage |
|---|---|
| FUEL/PUMP | Fuel Pump |
| LCK | Lock |
| LF FRT/ PWR/SEAT | Left Front Power Seat |
| LF/POS/LP | Left Position Lamp |
| PWR CLMN | Power Steering Column |
| PWR/WNDW | Power Window |
| REAR/FOG | Not Used |
| RT FRT/ PWR/SEAT | Right Front Power Seat |
| RT/POS/LP | Right Position Lamp |
| SPARE | Spare |
| STOP/LP | Stoplamp |
| TRUNK/RELSE | Trunk Release |
| UNLCK | Unlock |
| AIRBAG | Airbag System |
| AMP | Amplifier |
| AUX/OUTLET | Auxiliary Power Outlet |
| CNSTR/VENT | Canister Vent |
| DR/LCK | Door Lock |
| ECM | Engine Control Module (ECM) |
| FUEL/PUMP | Fuel Pump |
| LT/POS/LP | Left Position Lamp |
| LT/REAR/WNDW | Left Rear Window |
| MSM | Memory Seat Module |
| ONSTAR | OnStar System |
| PDM | Passenger Door Module |
| RDO | Audio System |
| RDO/SPKR | Audio Speakers |
| REAR/FOG | Not Used |
| REAR/WNDW | Rear Window |
| RKE/PASS-KEY/MDL | Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module |
| RT/POS/LP | Right Position Lamp |
| RT/POS/LP | Right Position Lamp |
| RVC/SNSR | Regulated Voltage Control Sensor |
| S/ROOF | Sunroof |
| SPARE | Spare |
| SPARE | Spare |
| STOP/LP | Stoplamp |
| THEFT/UGDO | Theft Deterrent System, Universal Home Remote System |
| TRUNK/RELSE | Trunk Release |
2009
Underhood Fuse Block
| Name | Usage |
|---|---|
| A/C CLTCH | Air Conditioning Clutch |
| ABS | Antilock Braking System (ABS) |
| AFS | Adaptive Forward Lighting System |
| AIRBAG IGN | Airbag Switch |
| AWD | All-Wheel Drive |
| BCM 1 | Body Control Module 1 |
| BCM 2 | Body Control Module 2 |
| BCM 3 | Body Control Module 3 |
| BCM 4 | Body Control Module 4 |
| BCM 5 | Body Control Module 5 |
| SPARE | Spare |
| BCM 6, BCM 7 | Body Control Module 6 and 7 |
| DISPLY | Display |
| DRL RT | Right Daytime Running Lamp (DRL) |
| DRL/WSW | Daytime Running Lamps/Windshield Washer Pump |
| ECM | Engine Control Module (ECM) |
| ECM/TCM IGN | ECM, Transmission Control Module (TCM), Instrument Panel Cluster (IPC), PASS-Key III+ Module |
| EMIS 1 | Emission 1 |
| EMIS2 | Emission 2 |
| EVEN COILS | Even Coils |
| FRT FOG | Front Fog Lamps |
| HDM WASH | Headlamp Driver Module Washer |
| HORN | Horn |
| LO BEAM DRL LEFT | Low-Beam Daytime Running Lamps (Left) |
| LT HI BEAM | Left High-Beam Headlamp |
| LT LO BEAM | Left Low-Beam Headlamp |
| DRL/LT LO BEAM | Daytime Running Lamps / Left Low-Beam Headlamp |
| LTR | Cigarette Lighter |
| MISC IGN | Ignition |
| NAV MTR | Navigation Motor |
| ODD COILS | Odd Coils |
| PED PRO | Not Used |
| PWR MODING | PASS-Key III+ Module, Body Control Module |
| RT HI BEAM | Right High-Beam Headlamp |
| RT LO BEAM | Right Low-Beam Headlamp |
| RT LO BEAM | Right Low-Beam Headlamp |
| SPARE | Spare |
| SPARE | Spare |
| STR/WHL/ ILLUM | Steering Wheel Illumination |
| TCM BATT | Transmission Control Module Battery |
| MAN SPD SNSR | Manual Speed Sensor |
| WPR | Windshield Wiper |
| ENG PUMP | Engine Pump |
| ABS MTR | ABS Motor |
| BLWR | Blower |
| BRK VAC PUMP | Brake Vacuum Pump |
| FAN 1 | Cooling Fan 1 |
| FAN 2 | Cooling Fan 2 |
| REAR DEFOG | Rear Defogger |
| SPARE | Spare |
| EPB | Electric Park Brake |
| SPARE | Spare |
| STRTR | Starter |
| SPARE | Spare |
| WSW/HTR | Windshield Washer Heater |
| A/C CMPRSR CLTCH | Air Conditioning Compressor Clutch |
| DRL (W/O HID) LO BEAM (HID) | Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge) |
| ENG PUMP | Engine Pump |
| FAN S/P | Cooling Fan Series / Parallel |
| FAN 1 | Cooling Fan 1 |
| FAN 2 | Cooling Fan 2 |
| HI BEAM | High-Beam Headlamp |
| HORN | Horn |
| IGN 1 | Ignition 1 |
| LO BEAM (W/O HID) LT DRL (HID) | Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge) |
| PWR/TRN | Powertrain |
| REAR DEFOG | Rear Defogger |
| SPARE | Spare |
| STRTR | Starter |
| WPR | Windshield Wiper |
| WPR HI | Windshield Wiper High Speed |
| WSW PUMP | Windshield Washer Pump |
| FOG LAMP | Fog Lamps |
| RT DRL (HID) | Right Daytime Running Lamp (High Intensity Discharge) |
| HEAD LAMP WASH | Headlamp Washer |
Rear Compartment Fuse Block
| Name | Usage |
|---|---|
| FUEL/PUMP | Fuel Pump |
| LCK | Lock |
| LT/POS/LP | Left Position Lamp |
| REAR/FOG | Not Used |
| RT/POS/LP | Right Position Lamp |
| FUEL/DR/ RELSE | Not Used |
| STOP/LP | Stoplamp |
| TRUNK/RELSE | Trunk Release |
| UNLCK | Unlock |
| AIRBAG | Airbag System |
| AMP | Amplifier |
| AUX/OUTLET | Auxiliary Power Outlet |
| CNSTR/VENT | Canister Vent |
| DR/LCK | Door Lock |
| ECM | Engine Control Module (ECM) |
| FUEL/PUMP | Fuel Pump |
| LT/POS/LP | Left Position Lamp |
| MSM | Memory Seat Module |
| ONSTAR | OnStar System |
| PDM | Passenger Door Module |
| RDO | Audio System |
| RDO/SPKR | Audio Speakers |
| REAR/FOG | Not Used |
| RKE / PASS-KEY/ MDL | Remote Keyless Entry System, PASS-Key III+ Theft Deterrent Feature Module |
| RT/POS/LP | Right Position Lamp |
| RT/POS/LP | Right Position Lamp |
| RVC/SNSR | Regulated Voltage Control Sensor |
| S/ROOF | Sunroof |
| SPARE | Spare |
| SPARE | Spare |
| STOP/LP | Stoplamp |
| THEFT/UGDO | Theft Deterrent System, Universal Home Remote System |
| TRUNK/RELSE | Trunk Release |
| LF FRT/ WR/SEAT | Left Front Power Seat |
| PWR CLMN | Power Steering Column |
| PWR/WNDW | Power Window |
| RT FRT/ WR/SEAT | Right Front Power Seat |
| LT/REAR NDW | Left Rear Window |
| REAR/WNDW | Right Rear Window |
2010
Underhood Fuse Block
| Name | Usage |
|---|---|
| A/C CLTCH | Air Conditioning Clutch |
| ABS | Antilock Braking System (ABS) |
| AFS | Adaptive Forward Lighting System |
| AIRBAG IGN | Airbag Switch |
| AWD | All-Wheel Drive |
| BCM 1 | Body Control Module 1 |
| BCM 2 | Body Control Module 2 |
| BCM 3 | Body Control Module 3 |
| BCM 4 | Body Control Module 4 |
| BCM 5 | Body Control Module 5 |
| AQS/ISRVM/ REAR CAMERA | Air Quality Sensor / Inside Rear View Mirror/Rear View Camera |
| BCM 6, BCM 7 | Body Control Module 6 and 7 |
| DISPLY | Display |
| DRL RT | Right Daytime Running Lamp (DRL) |
| DRL/WSW | Daytime Running Lamps / Windshield Washer Pump |
| ECM | Engine Control Module (ECM) |
| ECM/TCM IGN | ECM, Transmission Control Module (TCM), Instrument Panel Cluster (IPC), PASS-Key III+ Module |
| EMIS 1 | Emission 1 |
| EMIS2 | Emission 2 |
| EVEN COILS | Even Coils |
| FRT FOG | Front Fog Lamps |
| HDLP WASH | Headlamp Washer |
| HORN | Horn |
| LO BEAM DRL LEFT | Low-Beam Daytime Running Lamps (Left) |
| LT HI BEAM | Left High-Beam Headlamp |
| LT LO BEAM | Left Low-Beam Headlamp |
| DRL/LT LO BEAM | Daytime Running Lamps/Left Low-Beam Headlamp |
| LTR | Cigarette Lighter |
| MISC IGN | Ignition |
| NAV MTR | Navigation Motor |
| ODD COILS | Odd Coils |
| PED PRO | Not Used |
| PWR MODING | PassKey Module, Body Control Module |
| RT HI BEAM | Right High-Beam Headlamp |
| RT LO BEAM | Right Low-Beam Headlamp |
| RT LO BEAM | Right Low-Beam Headlamp |
| SPARE | Spare |
| SPARE | Spare |
| STR/WHL/ CNTRL | Steering Wheel Illumination |
| TCM BATT | Transmission Control Module Battery |
| TOSS/BRK VAC RLY | Transmission Output Speed Sensor / Brake Vacuum Relay |
| WPR | Windshield Wiper |
| SPARE | Spare |
| ABS MTR | ABS Motor |
| BLWR | Blower |
| BRK VAC PUMP | Brake Vacuum Pump |
| FAN 1 | Cooling Fan 1 |
| FAN 2 | Cooling Fan 2 |
| REAR DEFOG | Rear Defogger |
| SPARE | Spare |
| EPB | Electric Park Brake |
| SPARE | Spare |
| STRTR | Starter |
| SPARE | Spare |
| WSW/HTR | Not Used |
| A/C CMPRSR | Air Conditioning Compressor Clutch |
| DRL (W/0 HID) LO BEAM (HID) | Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge) |
| SPARE | Spare |
| FAN S/P | Cooling Fan Series / Parallel |
| FAN 1 | Cooling Fan 1 |
| FAN 2 | Cooling Fan 2 |
| HI BEAM | High-Beam Headlamp |
| HORN | Horn |
| IGN 1 | Ignition 1 |
| LO BEAM (W/O HID) LT DRL (HID) | Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge) |
| HDLP WASH | Headlamp Washer |
| PWR/TRN | Powertrain |
| REAR DEFOG | Rear Defogger |
| SPARE | Spare |
| STRTR | Starter |
| WPR | Windshield Wiper |
| WPR HI | Windshield Wiper High Speed |
| WSW | Windshield Washer Pump |
| FOG LAMP | Fog Lamps |
| RT DRL (HID) | Right Daytime Running Lamp (High Intensity Discharge) |
Rear Compartment Fuse Block
| Name | Usage |
|---|---|
| MRKR/LP | Not Used |
| LCK | Lock |
| LT/POS/LP | Left Position Lamp |
| REAR/FOG | Not Used |
| RT/POS/LP | Not Used |
| FUEL/DR/RELSE | Not Used |
| STOP/LP | Not Used |
| TRUNK/ RELSE | Trunk Release |
| UNLCK | Unlock |
| AIRBAG | Airbag System |
| AMP | Amplifier |
| AUX/OUTLET | Auxiliary Power Outlet |
| CNSTR/VENT | Canister Vent |
| DR/LCK | Door Lock |
| ECM | Engine Control Module (ECM) |
| FUEL/PUMP | Fuel Pump |
| LT/POS/LP | Left Position Lamp |
| MSM | Memory Seat Module |
| ONSTAR | OnStar System |
| PDM | Passenger Door Module |
| RDO | Audio System |
| RDO/SPKR | Audio Speakers |
| REAR/FOG | Not Used |
| RKE/PASS-KEY/MDL | Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module |
| RT/POS/LP | Not Used |
| RT/POS/LP | Right Position Lamp |
| RVC/SNSR | Regulated Voltage Control Sensor |
| S/ROOF | Sunroof |
| TRLR/POS/LP | Not Used |
| EE SEAT | Not Used |
| STOP/LP | Not Used |
| THEFT/UGDO | Theft Deterrent System, Universal Home Remote System |
| TRUNK/RELSE | Trunk Release |
| DRV/PWR/ SEAT | Left Front Power Seat |
| PWR CLMN | Power Steering Column |
| PWR/WNDW | Power Window |
| PASS/PWR/SEAT | Right Front Power Seat |
| LT/REAR/WNDW | Left Rear Window |
| REAR/WNDW | Right Rear Window |
2011
Underhood Fuse Block
| № | Usage |
|---|---|
| 11 | Not Used |
| 19 | Antilock Braking System (ABS) |
| 22 | Display |
| 23 | Not Used |
| 24 | Body Control Module 1 |
| 25 | Automatic Forward Lighting System (HID Only) |
| 26 | Body Control Module 5 |
| 27 | Body Control Module 4 |
| 28 | Navigation Motor |
| 29 | All-Wheel Drive |
| 30 | Transmission Control Module Battery |
| 31 | Horn |
| 33 | Left Low-Beam Headlamp (Domestic Non-HID Only) |
| 34 | Pedestrian Protection System (Export Only) |
| 35 | Body Control Module 3 |
| 36 | Body Control Module 2 |
| 38 | Headlamp Washer (HID Only) |
| 40 | Right Low-Beam Headlamp (Domestic Non-HID Only) |
| 41 | Air Conditioning Compressor Clutch |
| 43 | Low-Beam Daytime Running Lamps (non-HID), Left Daytime Running Lamps (HID), Left Trailer Turn Signal (Export Only) |
| 46 | Left High-Beam Headlamp |
| 47 | Right High-Beam Headlamp |
| 50 | Right Daytime Running Lamp, Windshield Washer Pump |
| 51 | Airbag System Ignition Switch |
| 52 | Engine Control Module Ignition, Transmission Control Module Ignition |
| 54 | Power Moding (Immobilizer Module, Ignition Switch) |
| 55 | Not Used |
| 56 | Windshield Wipers |
| 57 | Right Low-Beam (HID Only) |
| 58 | Daytime Running Lamps (non-HID), Left Low-Beam (HID Only) |
| 59 | Right Daytime Running Lamp (HID Only), Right Trailer Turn Signal (Export Only) |
| 60 | Instrument Panel Auxiliary Power Outlet |
| 61 | Air Quality Sensor, Inside Rear View Mirror, Rear Camera |
| 62 | Ignition |
| 64 | Steering Wheel Illumination |
| 65 | Front Fog Lamps (HID Only) |
| 69 | Body Control Module 6, Body Control Module 7 |
| 70 | Emissions 1 |
| 71 | Even Ignition Coils |
| 72 | Engine Control Module |
| 73 | Emissions 2 |
| 74 | Odd Ignition Coils |
| 75 | Transmission Output Speed Sensor, Brake Vacuum Relay |
| 76 | Spare |
| 77 | Spare |
| 78 | Spare |
| 79 | Spare |
| 80 | Spare |
| 81 | Spare |
| 6 | Cooling Fan 2 |
| 7 | Cooling Fan 1 |
| 8 | Starter |
| 9 | Brake Vacuum Pump |
| 10 | Antilock Brake System Motor |
| 13 | Not Used |
| 14 | Electric Parking Brake |
| 15 | Not Used |
| 16 | Not Used |
| 17 | Blower Motor |
| 18 | Rear Window Defogger |
| 37 | Not Used |
| 1 | Cooling Fan 2 |
| 2 | Cooling Fan 1 |
| 3 | Starter |
| 4 | Rear Window Defogger |
| 5 | Instrument Panel Auxiliary Power Outlet |
| 12 | Horn |
| 20 | Headlamp Washer (HID Only) |
| 21 | Cooling Fan (Series / Parallel) |
| 32 | Air Conditioning Compressor Clutch |
| 39 | Windshield Washer Pump |
| 42 | Right Daytime Running Lamp, Trailer Turn Signal |
| 44 | Low-Beam (non-HID), Left Daytime Running Lamps (HID), Left Trailer Turn Signal (Export Only) |
| 45 | Front Fog Lamps (HID Only) |
| 48 | High-Beam Headlamps |
| 49 | Daytime Running Lamps (Non-HID), Low-Beam Headlamps (HID) |
| 53 | Not Used |
| 63 | Main Ignition |
| 66 | Windshield Wipers |
| 67 | Powertrain |
| 68 | Windshield Wipers High Speed |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| 5 | Stop Lamps (Export Only) |
| 6 | Door Lock |
| 7 | Door Unlock |
| 8 | Fuel Door Unlock (Export Only) |
| 9 | Right Position Lamp (Export Only) |
| 10 | Console / Auxiiiary Power Outlet |
| 11 | Sedan Trunk Release / Coupe Rear Fog (Export Only) |
| 12 | Side Marker Lamps |
| 13 | Left Position Lamps |
| 14 | Right Position Lamp |
| 15 | Left Position Lamp |
| 16 | Door Lock |
| 17 | Console / Auxiliary Power Outlet |
| 18 | Rear Fog / Export Body Control Module (Export Only) |
| 19 | Trunk Release |
| 20 | Easy Entry Seats (Coupe Only) |
| 21 | Sunroof |
| 22 | Right Position Lamp (Export Only) |
| 23 | Regulated Voltage Control Sensor |
| 24 | Audio System (Radio) |
| 25 | Airbag System |
| 26 | Remote Keyless Entry / PASS-Key Theft Deterrent Module |
| 27 | Audio Speakers / Subwoofer |
| 28 | OnStar System (If Equipped) |
| 29 | Engine Control Module |
| 30 | Canister Vent |
| 31 | Fuel Pump |
| 33 | Stop Lamps (Export Only) |
| 34 | Theft Deterrent System / Universal Garage Door Opener |
| 35 | Memory Seat Module |
| 36 | Passenger Door Module |
| 38 | Not Used |
| 39 | Amplifier |
| 1 | Driver Power Seat Switch |
| 2 | Passenger Power Seat Switch |
| 3 | Power Windows |
| 4 | Power Steering Column |
| 32 | Left Rear Window Switch |
| 37 | Right Rear Window Switch |