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In this article, you will find information about the fuses of the Cadillac ATS (models 2017, 2018, and 2019), 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 ATS
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. 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 damage caused by electrical problems. To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to 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 on the passenger side of the engine compartment. Lift the fuse block cover to access the fuses. Engine Compartment Fuse Relay Center:
Instrument Panel Fuse Block:
The instrument panel fuse block is in the end of the driver side of the instrument panel. To access the fuses, remove the end panel by gently prying with a plastic tool near each clip, beginning at the point shown.
Rear Compartment Fuse Block:
The rear compartment fuse block is behind a cover on the driver side of the rear compartment.
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. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Fuse Box Diagrams
2017
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | - |
| 2 | - |
| 3 | Passenger motorized safety belt |
| 4 | - |
| 5 | - |
| 6 | Driver power seat |
| 7 | - |
| 8 | Headlamp washer relay |
| 9 | - |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | Passenger power seat |
| 14 | - |
| 15 | Passive entry / Passive start |
| 16 | - |
| 17 | Headlamp washer |
| 18 | - |
| 19 | ABS pump |
| 20 | ABS valve |
| 21 | - |
| 22 | Driver motorized safety belt |
| 23 | Wiper control relay |
| 24 | Wiper speed relay |
| 25 | Engine control module relay |
| 26 | - |
| 27 | Heated seat 2 |
| 28 | Reverse lockout |
| 29 | AFS AHL / Pedestrian protection |
| 30 | - |
| 31 | Passenger window switch |
| 32 | - |
| 33 | Sunroof |
| 34 | Front wiper |
| 35 | Steering column lock |
| 36 | Rear bussed electrical center / Ignition |
| 37 | MIL / Ignition |
| 38 | Aeroshutter |
| 39 | O2 sensor / Emissions |
| 40 | Ignition coils / Injectors |
| 41 | Ignition coils / Injectors |
| 42 | Engine control module |
| 43 | - |
| 44 | - |
| 45 | Washer |
| 46 | Rear washer relay |
| 47 | Front washer relay |
| 48 | Instrument panel body / Ignition |
| 49 | Fuel system control module/Ignition |
| 50 | Heated steering wheel |
| 51 | Engine control module / Ignition |
| 52 | Transmission control module / Ignition |
| 53 | Coolant pump |
| 54 | Coolant pump relay |
| 55 | - |
| 56 | Transmission control module |
| 57 | Low-beam headlamp relay |
| 58 | High-beam headlamp relay |
| 59 | Run/Crank relay |
| 60 | Starer 2 relay |
| 61 | Vacuum pump relay |
| 62 | Starter relay |
| 63 | A/C control relay |
| 64 | Adaptive headlamp leveling |
| 65 | Left HID headlamp |
| 66 | Right HID headlamp |
| 67 | Left/Right high-beam headlamp |
| 68 | Headlamp leveling motor |
| 69 | Horn |
| 70 | Horn relay |
| 71 | Cooling fan |
| 72 | Starter 2 |
| 73 | Brake vacuum pump |
| 74 | Starter |
| 75 | A/C clutch |
| 76 | - |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| 2 | Cupholder motor |
| 3 | Electric steering column lock |
| 4 | - |
| 5 | - |
| 6 | Tilt and telescoping steering column |
| 8 | Data link connector |
| 9 | Glovebox release |
| 10 | Shunt |
| 11 | Body control module 1 |
| 12 | Body control module 5 |
| 13 | Body control module 6 |
| 14 | - |
| 15 | Body control module 7 |
| 16 | - |
| 17 | - |
| 18 | - |
| 19 | Auxiliary power outlet |
| 20 | Lighter |
| 21 | Wireless charger |
| 22 | Sensing diagnostic module / Automatic occupant sensing |
| 23 | Radio / DVD / HVAC control |
| 24 | Display |
| 25 | Heated steering wheel |
| 26 | Wireless charger |
| 27 | Steering wheel controls |
| 28 | - |
| 29 | Visor vanity lamp |
| 30 | - |
| 31 | Retained accessory power / Accessory |
| 32 | - |
| 33 | Front HVAC blower |
| CB1 | Auxiliary power outlet |
| CB7 | - |
| K10 | Retained accessory power / Accessory |
| K605 | Logistics |
| K644 | Retained Accessory power/Accessory / Glovebox release |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| *4 | A/C inverter |
| 5 | Passive entry / Passive start battery 1 |
| 6 | Body control module 4 |
| 7 | Heated mirrors |
| 8 | Amplifier |
| 9 | Rear window defogger |
| 10 | Glass break |
| *11 | Trailer connector |
| 12 | OnStar (if equipped) |
| 13 | Right window |
| 14 | Electric parking brake |
| 15 | - |
| 16 | Trunk release |
| *17 | Run relay |
| *18 | Logistics relay |
| *19 | - |
| 20 | Rear window defogger relay |
| 21 | Mirror window module |
| 22 | - |
| 23 | Canister vent |
| 24 | Body control module 2 |
| *25 | Rear vision camera |
| *26 | Front ventilated seats |
| *27 | SBZA / LDW / EOCM |
| *28 | Trailer / Sunshade |
| *29 | Rear heated seats |
| *30 | Semi-active damping system |
| *31 | Transfer case control module / Rear control drive module |
| 32 | Theft module / Universal garage door opener / Rain sensor |
| *33 | UPA |
| *34 | Radio/DVD |
| *35 | Exhaust valve |
| *36 | Trailer |
| 37 | Fuel pump / Fuel system control module |
| *38 | Fuel pump |
| 39 | - |
| 40 | Run/Crank |
| *41 | Fuel pump prime |
| *42 | Memory seat module |
| 43 | Body control module 3 |
| 44 | - |
| 45 | Battery regulated voltage control |
| 46 | Engine control module battery |
| 47 | - |
| 48 | - |
| *49 | Trailer module |
| 50 | Door lock security |
| 51 | Rear closure release |
| 52 | Rear closure 2 |
| 53 | - |
| 54 | Door lock security |
| 55 | - |
| *56 | Fuel door |
| * Optional | |
2018
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | - |
| 2 | - |
| 3 | Passenger motorized seat belt |
| 4 | - |
| 5 | - |
| 6 | Driver power seat |
| 7 | - |
| 9 | - |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | Passenger power seat |
| 14 | - |
| 15 | Passive entry / Passive start |
| 16 | - |
| 17 | Headlamp washer |
| 18 | - |
| 19 | Antilock brake system pump |
| 20 | Antilock brake system valve |
| 21 | - |
| 22 | Driver motorized seat belt |
| 26 | - |
| 27 | Heated seat 2 |
| 28 | Reverse lock out |
| 29 | Adaptive forward lighting, Automatic headlamp leveling / Pedestrian protection |
| 30 | - |
| 31 | Passenger window switch |
| 32 | - |
| 33 | Sunroof |
| 34 | Front wiper |
| 35 | Steering column lock |
| 36 | Rear bussed electrical center / Ignition |
| 37 | Malfunction Indicator Lamp / Ignition |
| 38 | Aeroshutter |
| 39 | O2 sensor / Emissions |
| 40 | Ignition coil even / O2 sensor |
| 41 | Ignition coil odd |
| 42 | Engine control module |
| 43 | - |
| 44 | - |
| 45 | Washer |
| 48 | Instrument panel / Body / Ignition |
| 49 | Fuel system control module / Ignition |
| 50 | Heated steering wheel |
| 51 | Engine control module / Ignition |
| 52 | Transmission control module / Ignition |
| 53 | Coolant pump |
| 55 | - |
| 56 | Transmission control module |
| 64 | Adaptive headlamp leveling |
| 65 | Left HID headlamp |
| 66 | Right HID headlamp |
| 67 | Left/Right high-beam headlamp |
| 68 | Headlamp leveling motor |
| 69 | Horn |
| 71 | Cooling fan |
| 72 | Starter 2 |
| 73 | Brake vacuum pump |
| 74 | Starter 1 |
| 75 | Air conditioning clutch |
| 76 | - |
| 8 | Headlamp washer |
| 23 | Wiper control |
| 24 | Wiper speed |
| 25 | Engine control module |
| 46 | Rear washer |
| 47 | Front washer |
| 54 | Coolant pump |
| 57 | Low-beam headlamp relay |
| 58 | High-beam headlamp |
| 59 | Run/Crank |
| 60 | Starter 2 |
| 61 | Vacuum pump |
| 62 | Starter 1 |
| 63 | Air conditioning control |
| 70 | Horn |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| 2 | Cupholder motor |
| 3 | Electric steering column lock |
| 4 | - |
| 5 | - |
| 6 | Tilt and telescopic steering column |
| 8 | Data link connector |
| 9 | Glovebox release |
| 10 | Shunt |
| 11 | Body control module 1 |
| 12 | Body control module 5 |
| 13 | Body control module 6 |
| 14 | - |
| 15 | Body control module 7 |
| 16 | Transmission control module |
| 17 | - |
| 18 | - |
| 19 | Auxiliary power outlet |
| 20 | Lighter |
| 21 | Wireless charger |
| 22 | Sensing diagnostic module / Automatic occupant sensing |
| 23 | Radio / DVD / Heating, ventilation / Air conditioning control |
| 24 | Display |
| 25 | Heated steering wheel |
| 26 | Wireless charger |
| 27 | Steering wheel controls |
| 28 | - |
| 29 | Visor vanity lamp |
| 30 | - |
| 31 | Retained accessory power / Accessory |
| 32 | - |
| 33 | Front heating, ventilation / Air conditioning control blower |
| CB1 | Auxiliary power outlet |
| CB7 | - |
| K10 | Retained accessory power / Accessory |
| K605 | Logistics |
| K644 | Retained accessory power / Accessory / Glovebox release |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Rear driver control module / DC DC transformer |
| 2 | Left window |
| 3 | Body control module 8 |
| 4 | Alternate current inverter |
| 5 | Passive entry / Passive start / Battery 1 |
| 6 | Body control module 4 |
| 7 | Heated mirrors |
| 8 | Amplifier |
| 9 | Rear window defogger |
| 10 | Glass break |
| 11 | Trailer connector |
| 12 | OnStar (if equipped) |
| 13 | Right window |
| 14 | Electric parking brake |
| 15 | - |
| 16 | Trunk release |
| 19 | Logistics |
| 21 | Mirror window module |
| 22 | - |
| 23 | Canister vent |
| 24 | Body control module 2 |
| 25 | Rear vision camera |
| 26 | Front ventilated seats |
| 27 | Side blind zone alert / Lane departure warning / External object calculating module |
| 28 | Trailer / Sunshade |
| 29 | Rear heated seats |
| 30 | Semi-active damping system |
| 31 | Transfer case control module / Rear control drive module |
| 32 | Theft module / Universal garage door opener / Rain sensor |
| 33 | Ultrasonic parking assist |
| 34 | Radio/DVD |
| 35 | Exhaust valve (V-series) |
| 36 | Trailer |
| 37 | Fuel system control module |
| 38 | Fuel pump prime / Exhaust valve (V-series) |
| 39 | - |
| 42 | Memory seat module |
| 43 | Body control module 3 |
| 44 | - |
| 45 | Battery regulated voltage control |
| 46 | Engine control module / Battery |
| 47 | - |
| 48 | - |
| 49 | Trailer module |
| 53 | - |
| 55 | - |
| 17 | Trailer |
| 18 | Logistics |
| 20 | Rear window defogger |
| 40 | Run crank 2 (V-series) |
| 41 | Fuel pump prime / Run crank 2 |
| 50 | Child door lock security |
| 51 | Rear closure |
| 52 | Rear closure 2 |
| 54 | Door lock security |
| 56 | Fuel door |
2019
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | - |
| 2 | - |
| 3 | Passenger motorized seat belt |
| 4 | - |
| 5 | - |
| 6 | Driver power seat |
| 7 | - |
| 9 | - |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | Passenger power seat |
| 14 | - |
| 15 | - |
| 16 | - |
| 17 | Headlamp washer |
| 18 | - |
| 19 | Antilock brake system pump |
| 20 | Antilock brake system valve |
| 21 | - |
| 22 | Driver motorized seat belt |
| 27 | Heated seat 2 |
| 28 | Reverse lock out |
| 29 | Adaptive forward lighting, Automatic headlamp leveling / Pedestrian protection |
| 30 | - |
| 31 | Passenger window switch |
| 32 | - |
| 33 | Sunroof |
| 34 | Front wiper |
| 35 | Steering column lock |
| 36 | Rear bussed electrical center / Ignition |
| 37 | Malfunction indicator lamp / Ignition |
| 38 | Aeroshutter |
| 39 | O2 sensor / Emissions |
| 40 | Ignition coil even / O2 sensor |
| 41 | Ignition coil odd |
| 42 | Engine control module |
| 43 | - |
| 45 | Washer |
| 48 | Instrument panel / Body / Ignition |
| 49 | Fuel system control module / Ignition |
| 50 | Heated steering wheel |
| 51 | Engine control module / Ignition |
| 52 | Transmission control module / Ignition |
| 53 | Coolant pump |
| 55 | - |
| 56 | Transmission control module |
| 64 | Adaptive headlamp leveling |
| 65 | Left HID headlamp |
| 66 | Right HID headlamp |
| 67 | Left/Right high-beam headlamp |
| 68 | Headlamp leveling motor |
| 69 | Horn |
| 71 | Cooling fan |
| 72 | Starter 2 |
| 73 | Brake vacuum pump |
| 74 | Starter 1 |
| 75 | Air conditioning clutch |
| 76 | - |
| 8 | Headlamp washer |
| 23 | Wiper control |
| 24 | Wiper speed |
| 25 | Engine control module |
| 26 | - |
| 44 | - |
| 46 | Rear washer |
| 47 | Front washer |
| 54 | Coolant pump |
| 57 | Low-beam headlamp relay |
| 58 | High-beam headlamp |
| 59 | Run/Crank |
| 60 | Starter 2 |
| 61 | Vacuum pump |
| 62 | Starter 1 |
| 63 | Air conditioning control |
| 70 | Horn |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| 2 | Cupholder motor |
| 3 | Electric steering column lock |
| 4 | - |
| 5 | - |
| 6 | Tilt and telescopic steering column |
| 8 | Data link connector |
| 9 | Glove box release |
| 10 | Shunt |
| 11 | Body control module 1 |
| 12 | Body control module 5 |
| 13 | Body control module 6 |
| 14 | - |
| 15 | Body control module 7 |
| 16 | Transmission control module |
| 17 | - |
| 18 | - |
| 19 | Auxiliary power outlet |
| 20 | Lighter |
| 21 | Wireless charger |
| 22 | Sensing diagnostic module / Automatic occupant sensing |
| 23 | Radio / DVD / Heating, ventilation / Air conditioning control |
| 24 | Display |
| 25 | Heated steering wheel |
| 26 | Wireless charger |
| 27 | Steering wheel controls |
| 28 | - |
| 29 | Visor vanity lamp |
| 30 | - |
| 31 | Retained accessory power / Accessory |
| 32 | - |
| 33 | Front heating, ventilation / Air conditioning control blower |
| CB1 | Auxiliary power outlet |
| CB7 | - |
| K10 | Retained accessory power / Accessory |
| K605 | Logistics |
| K644 | Retained accessory power / Accessory / Glove box release |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Rear driver control module / DC DC transformer |
| 2 | Left window |
| 3 | Body control module 8 |
| 4 | Alternate current inverter |
| 5 | Passive entry / Passive start / Battery 1 |
| 6 | Body control module 4 |
| 7 | Heated mirrors |
| 8 | Amplifier |
| 9 | Rear window defogger |
| 10 | Glass break |
| 11 | Trailer connector |
| 12 | OnStar |
| 13 | Right window |
| 14 | Electric parking brake |
| 15 | - |
| 16 | Trunk release |
| 19 | Logistics |
| 21 | Mirror window module |
| 22 | - |
| 23 | Canister vent |
| 24 | Body control module 2 |
| 25 | Rear vision camera |
| 26 | Front ventilated seats |
| 27 | Side blind zone alert / Lane departure warning / External object calculating module |
| 28 | Trailer / Sunshade |
| 29 | Rear heated seats |
| 30 | Semi-active damping system |
| 31 | Transfer case control module / Rear control drive module |
| 32 | Theft module / Universal remote system / Rain sensor |
| 33 | Park assist |
| 34 | Radio/DVD |
| 35 | Exhaust valve (V-Series) |
| 36 | Trailer |
| 37 | Fuel system control module |
| 38 | Fuel pump prime / Exhaust valve (V-Series) |
| 39 | - |
| 42 | Memory seat module |
| 43 | Body control module 3 |
| 44 | - |
| 45 | Battery regulated voltage control |
| 46 | Engine control module / Battery |
| 47 | - |
| 48 | - |
| 49 | Trailer module |
| 53 | - |
| 55 | - |
| 17 | Trailer |
| 18 | Logistics |
| 20 | Rear window defogger |
| 40 | Run crank 2 (V-Series) |
| 41 | Fuel pump prime / Run crank 2 |
| 50 | Child door lock security |
| 51 | Rear closure |
| 52 | Rear closure 2 |
| 54 | Door lock security |
| 56 | Fuel door |