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In this article, you will find information about the fuses of the Cadillac XTS (models 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 XTS
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!
- Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. Use of an oversized fuse or circuit breaker can result in a vehicle fire.
- 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:
To remove the fuse block cover, squeeze the three retaining clips on the cover and lift it straight up.
Instrument Panel Fuse Block:
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle. To access the fuses, open the fuse panel door by pulling down at the top. Press in on the sides of the door to release it from the instrument panel. Pull the door toward you to release it from the hinge.
Rear Compartment Fuse Block:
The rear compartment fuse block is on the left side of the trunk behind a cover.
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
2018
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Transmission control module |
| 2 | Engine control module |
| 3 | A/C clutch |
| 4 | - |
| 5 | Engine control module / Ignition |
| 6 | Front wiper |
| 7 | - |
| 8 | Ignition coils - even |
| 9 | Ignition coils - odd |
| 10 | Engine control module |
| 11 | Mass air flow sensor / Post catalytic converter O2 sensors |
| 12 | Starter |
| 13 | Transmission control module / Chassis control module ignition |
| 14 | Rear heated seat passenger side |
| 15 | Rear heated side driver side |
| 16 | - |
| 17 | Sunshade / Vented seats |
| 18 | Autonet |
| 19 | - |
| 20 | - |
| 21 | Rear power windows |
| 22 | Sunroof |
| 23 | Variable effort steering module |
| 24 | Front power windows |
| 25 | Retained accessory power |
| 26 | ABS pump |
| 27 | Electric park brake |
| 28 | Rear window defogger |
| 29 | Passive entry / Passive start |
| 30 | Spare |
| 31 | Pleated driver seat |
| 32 | Stop lamps - center high mounted stop lamp / Backup-reverse lamps / Interior |
| 33 | Pleated passenger seat |
| 34 | ABS valves |
| 35 | Amplifier |
| 36 | Tail park lamp - driver side |
| 37 | Right high-beam headlamp |
| 38 | Left high-beam headlamp |
| 39 | Tail park lamp - passenger side |
| 40 | Long range radar |
| 41 | Brake vacuum assist pump |
| 42 | Cooling fan high speed |
| 43 | - |
| 44 | - |
| 45 | Cooling fan low speed |
| 46 | Cooling fan control |
| 47 | Pre-catalytic converter O2 sensor heater / Canister purge solenoid |
| 48 | Low temperature radiator coolant pump |
| 49 | Right headlamp LED |
| 50 | Left headlamp LED |
| 51 | Horn |
| 52 | Display / Ignition |
| 53 | Air quality sensor / Inside rearview mirror / Rear vision camera |
| 54 | HVAC / Reflective LED alert display |
| 55 | Driver and passenger door switches / Outside rearview mirror switch / Mirror memory module |
| 56 | Windshield washer |
| 57 | - |
| 58 | - |
| 59 | - |
| 60 | Heated outside rearview mirror |
| 61 | - |
| 62 | Front seats massage module |
| 63 | - |
| 64 | Spare |
| 65 | Spare |
| 66 | Trunk release |
| 67 | Chassis control module |
| 68 | - |
| 69 | Battery voltage sensor |
| 70 | Canister vent solenoid |
| 71 | Memory seat module |
| 72 | Electric power steering |
| 1 | A/C clutch |
| 2 | Starter |
| 3 | - |
| 4 | Wiper speed |
| 5 | Wiper control |
| 6 | - |
| 7 | Powertrain |
| 8 | - |
| 9 | Cooling fan - high speed |
| 10 | Cooling fan - low speed |
| 11 | Tail / Park lamps |
| 12 | - |
| 13 | Cooling fan control |
| 14 | Low beam LED headlamps |
| 15 | Run/Crank |
| 16 | - |
| 17 | Rear window and mirror defogger |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| 1 | Wireless charger module / USB charge |
| 2 | Body control module 7 |
| 3 | Body control module 5 |
| 4 | Radio |
| 5 | Infotainment display / Head-up display / Instrument cluster |
| 6 | Power outlet 1 |
| 7 | Power outlet 2 |
| 8 | Body control module 1 |
| 9 | Body control module 4 |
| 10 | Body control module 8 |
| 11 | Front HVAC blower |
| 12 | Passenger seat |
| 13 | Driver seat |
| 14 | Diagnostic link connector |
| 15 | Airbag AOS |
| 16 | Glove box |
| 17 | HVAC controller |
| 18 | Logistics |
| 19 | Front camera |
| 20 | Telematics (OnStar) |
| 21 | CGM |
| 22 | Steering wheel controls / Backlight |
| 23 | Body control module 3 |
| 24 | Body control module 2 |
| 25 | Power steering column |
| 26 | AC DC inverter |
| R1 | Glove box |
| R2 | Logistics |
| R3 | Retained accessory power |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| F01 | - |
| F02 | - |
| F03 | - |
| F04 | Suspension leveling compressor |
| F05 | - |
| F06 | - |
| F07 | - |
| F08 | Front courtesy lamps / Footwell, puddle lamps |
| F09 | - |
| F10 | - |
| F11 | - |
| F12 | - |
| F13 | Spare / MID Power Window |
| F14 | - |
| F15 | Spare |
| F16 | Video processing module |
| F17 | - |
| F18 | Semi-active damping system |
| F19 | Universal remote system / Rain, light, and humidity sensor |
| F20 | Shunt |
| F21 | Side blind zone alert |
| F22 | - |
| F23 | All wheel drive |
| F24 | - |
| F25 | - |
| F26 | - |
| F27 | - |
| F28 | - |
| F29 | - |
| F30 | External object calculation module |
| F31 | Park assist / Lane departure warning / Lane keep assist |
| F32 | - |
| F33 | - |
| F34 | - |
| F35 | - |
| F36 | - |
| F37 | - |
| K1 | - |
| K2 | Front courtesy lamp Footwell, puddle lamps |
| K3 | Suspension leveling compressor |
| K4 | - |
2019
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Transmission control module |
| 2 | Engine control module |
| 3 | A/C clutch |
| 4 | - |
| 5 | Engine control module / Ignition |
| 6 | Front wiper |
| 7 | - |
| 8 | Ignition coils - even |
| 9 | Ignition coils - odd |
| 10 | Engine control module |
| 11 | Mass air flow sensor / Post catalytic converter O2 sensors |
| 12 | Starter |
| 13 | Transmission control module / Chassis control module ignition |
| 14 | Rear heated seat - passenger side |
| 15 | Rear heated seat - driver side |
| 16 | - |
| 17 | Sunshade / Ventilated seats |
| 18 | Autonet |
| 19 | - |
| 20 | - |
| 21 | Rear power windows |
| 22 | Sunroof |
| 23 | Variable effort steering module |
| 24 | Front power windows |
| 25 | Retained accessory power |
| 26 | ABS pump |
| 27 | Electric parking brake |
| 28 | Rear window defogger |
| 29 | Passive entry / Passive start |
| 30 | Spare |
| 31 | Heated driver seat |
| 32 | Stoplamps - center high mounted stoplamp / Backup-reverse lamps / Interior |
| 33 | Heated passenger seat |
| 34 | ABS valves |
| 35 | Amplifier |
| 36 | Taillamp - driver side |
| 37 | Right high-beam headlamp |
| 38 | Left high-beam headlamp |
| 39 | Taillamp -passenger side |
| 40 | Long range radar |
| 41 | Brake vacuum assist pump |
| 42 | Cooling fan high speed |
| 43 | - |
| 44 | - |
| 45 | Cooling fan low speed |
| 46 | Cooling fan control |
| 47 | Pre-catalytic converter O2 sensor heater / Canister purge solenoid |
| 48 | Low temperature radiator coolant pump |
| 49 | Right headlamp LED |
| 50 | Left headlamp LED |
| 51 | Horn |
| 52 | Display / Ignition |
| 53 | Air quality sensor / Inside mirror / Rear vision camera |
| 54 | HVAC / Reflective LED alert display |
| 55 | Driver and passenger door switches / Outside rearview mirror switch / Mirror memory module |
| 56 | Windshield washer |
| 57 | - |
| 58 | - |
| 59 | - |
| 60 | Heated outside mirror |
| 61 | - |
| 62 | Front seats massage module |
| 63 | - |
| 64 | Spare |
| 65 | Spare |
| 66 | Trunk release |
| 67 | Chassis control module |
| 68 | - |
| 69 | Battery voltage sensor |
| 70 | Canister vent solenoid |
| 71 | Memory seat module |
| 72 | Electric power steering |
| 1 | A/C clutch |
| 2 | Starter |
| 3 | - |
| 4 | Wiper speed |
| 5 | Wiper control |
| 6 | - |
| 7 | Powertrain |
| 9 | Cooling fan - high speed |
| 10 | Cooling fan - low speed |
| 11 | Taillamps / Parking lamps |
| 12 | - |
| 13 | Cooling fan control |
| 14 | Low-beam LED headlamps |
| 15 | Run/Crank |
| 16 | - |
| 17 | Rear window and mirror defogger |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| 1 | Wireless charger module / USB charge |
| 2 | Body control module 7 |
| 3 | Body control module 5 |
| 4 | Radio |
| 5 | Infotainment display / Head-up display / Instrument cluster |
| 6 | Power outlet 1 |
| 7 | Power outlet 2 |
| 8 | Body control module 1 |
| 9 | Body control module 4 |
| 10 | Body control module 8 |
| 11 | Front HVAC blower |
| 12 | Passenger seat |
| 13 | Driver seat |
| 14 | Diagnostic link connector |
| 15 | Airbag AOS |
| 16 | Glove box |
| 17 | HVAC controller |
| 18 | Logistics |
| 19 | Front camera |
| 20 | Telematics (OnStar) |
| 21 | CGM |
| 22 | Steering wheel controls / Backlight |
| 23 | Body control module 3 |
| 24 | Body control module 2 |
| 25 | Power steering column |
| 26 | AC DC inverter |
| R1 | Glove box |
| R2 | Logistics |
| R3 | Retained accessory power |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| F01 | - |
| F02 | - |
| F03 | - |
| F04 | Suspension leveling compressor |
| F05 | - |
| F06 | - |
| F07 | - |
| F08 | Front courtesy lamps / Footwell, puddle lamps |
| F09 | - |
| F10 | - |
| F11 | - |
| F12 | - |
| F13 | Spare / MID Power Window |
| F14 | - |
| F15 | Spare |
| F16 | Video processing module |
| F17 | - |
| F18 | Semi-active damping system |
| F19 | Universal remote system / Rain, light, and humidity sensor |
| F20 | Shunt |
| F21 | Side blind zone alert |
| F22 | - |
| F23 | All wheel drive |
| F24 | - |
| F25 | - |
| F26 | - |
| F27 | - |
| F28 | - |
| F29 | - |
| F30 | External object calculation module |
| F31 | Park assist / Lane departure warning / Lane keep assist |
| F32 | - |
| F33 | - |
| F34 | - |
| F35 | - |
| F36 | - |
| F37 | - |
| K1 | - |
| K2 | Front courtesy lamps / Footwell, puddle lamps |
| K3 | Suspension leveling compressor |
| K4 | - |