Cadillac XT4 2021 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is on the driver side of the instrument panel, between the steering wheel and the door.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| 1 | Left power window |
| 2 | Right power window |
| 3 | - |
| 4 | DC DC battery 2/1 |
| 5 | Auxiliary power outlet – cargo |
| 6 | Heated seat battery 1 |
| 7 | Heated seat battery 2 |
| 8 | Body control module 3 |
| 9 | Electric parking brake switch |
| 10 | Body control module 2 (stop/start) |
| 11 | - |
| 12 | - |
| 13 | - |
| 14 | - |
| 15 | Transmission control module (stop/start) |
| 16 | Amplifier |
| 17 | - |
| 18 | Video processing module |
| 19 | Power steering column |
| 20 | Body control module 6 |
| 21 | Body control module 4 |
| 22 | Body control module 7 |
| 23 | Electric steering column lock |
| 24 | Airbag |
| 25 | Data link connector |
| 26 | - |
| 27 | - |
| 28 | - |
| 29 | Body control module 8 |
| 30 | Overhead console |
| 31 | Steering wheel control |
| 32 | - |
| 33 | Heating ventilation/Air conditioning |
| 34 | Central gateway module |
| 35 | Heated switch |
| 36 | Charger |
| 37 | Auxiliary power outlet – front |
| 38 | OnStar |
| 39 | Display |
| 40 | Obstacle detection |
| 41 | Body control module 1 (stop/start) |
| 42 | Radio |
| 43 | Auxiliary power outlet – console (circuit breaker) |
| 44 | Auxiliary power outlet – console |
| K1 | - |
| K2 | Retained accessory power |
| K3 | Content theft |
| K4 | - |
| K5 | - |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| 3 | Electronic brake control module |
| 4 | - |
| 5 | Trailer brake |
| 6 | Rear closure |
| 7 | Trailer stop/Turn LH |
| 8 | Memory seat module |
| 9 | Pedestrian friendly alert function |
| 10 | Semi-active damping system |
| 11 | DC DC Battery 1 |
| 12 | Rear defogger |
| 13 | Heated mirror |
| 14 | - |
| 15 | Passive entry passive start |
| 16 | Front wiper |
| 17 | Passenger power seat |
| 18 | Power liftgate module |
| 19 | Driver power seat |
| 20 | Rear defogger |
| 21 | Sunroof |
| 22 | Rear wiper |
| 23 | Trailer interface module 2 |
| 25 | Front wiper control |
| 26 | Transmission control module/Ignition |
| 27 | Instrument panel body/Ignition |
| 28 | Rear wiper |
| 29 | Trailer ignition |
| 30 | Malfunction indicator lamp start/stop Trailer interface module ignition |
| 31 | Run/Crank |
| 32 | Rear drive control module 1 |
| 33 | - |
| 34 | Handsfree/Window switch |
| 35 | Diesel exhaust fuel heater |
| 36 | Fuel module |
| 37 | Front wiper speed |
| 39 | Massage |
| 40 | Steering column lock |
| 41 | - |
| 42 | - |
| 43 | Heated steering wheel |
| 44 | Seat ventilation/Front heated seat |
| 46 | Engine control module/Ignition |
| 48 | Rear drive control module 2 |
| 49 | Heating ventilation/ Air conditioning blower motor |
| 50 | - |
| 51 | - |
| 54 | - |
| 55 | - |
| 56 | Starter motor |
| 57 | - |
| 58 | - |
| 59 | High-beam headlamps left/right |
| 60 | Trailer interface module 1 |
| 61 | - |
| 62 | - |
| 63 | - |
| 64 | Starter motor |
| 65 | Air conditioning control |
| 66 | Powertrain |
| 67 | - |
| 68 | - |
| 69 | - |
| 70 | Trailer park lamp |
| 71 | Trailer park lamp |
| 72 | Starter pinion |
| 73 | Air conditioning control |
| 75 | Engine control module |
| 76 | Powertrain off engine |
| 78 | Horn |
| 79 | Washer pump |
| 80 | Starter pinion |
| 81 | Transmission control module/Engine control module/ Cooling pump |
| 82 | Nitrogen oxide sensor |
| 83 | Ignition coil |
| 84 | Powertrain on engine |
| 85 | Shunt |
| 86 | - |
| 87 | Diesel fuel heater 1 |
| 88 | Aeroshutter |
| 89 | Selective catalytic reduction module |
| 90 | Powertrain sensor |
| 92 | Trailer stop/Turn right |
| 93 | Automatic headlamp leveling/Canister vent solenoid |
| 94 | Diesel exhaust fuel heater |
| 95 | Smart sensors |
| 96 | Diesel fuel heater 2 |
| 98 | Diesel fuel heater |
| 99 | - |
