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In this article, you will find information about the fuses of the Cadillac CTS (models 2012, 2013, 2014), 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 Coupe and Sedan
The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Replace a bad fuse with a new one of the identical size and rating.
Caution!
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
Location of Fuse Boxes
Engine Compartment Fuse Block:
The underhood fuse block is located on the left 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.
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage.
Fuse Box Diagrams
2012
Engine Compartment 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 / Auxiliary 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 | Side Blind Zone Alert (Coupe Only) |
| 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 |
2013
Engine Compartment 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 / Auxiliary 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 | Side Blind Zone Alert (Coupe Only) |
| 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 |
2014
Engine Compartment 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 / Auxiliary 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 | Side Blind Zone Alert (Coupe Only) |
| 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 |