Cadillac CT4 2025 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is located in the end of the driver side of the instrument panel.
Engine compartment fuse box location:
Luggage compartment fuse box location:
The rear compartment fuse box is located behind a cover on the driver side of the rear compartment.
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | - |
| 2 | Heating, Ventilation, and Air Conditioning Blower |
| 3 | - |
| 4 | - |
| 5 | Theft deterrent/ Universal garage door opener/Overhead console/Rain sensor |
| 6 | - |
| 7 | Air quality ionizer |
| 8 | Heated steering wheel |
| 9 | - |
| 10 | Electronic steering column lock 1 |
| 11 | - |
| 12 | - |
| 13 | - |
| 14 | - |
| 15 | - |
| 16 | - |
| 17 | - |
| 18 | Display/Infotainment/ USB/Multi-function Control Module |
| 19 | Sensing and Diagnostic Module/ Automatic Occupant Sensing/Data Link Connection/Wireless Charging Module/ Virtual Key Module |
| 20 | Power Steering Column Module/ Electronic Steering Column Lock 2 |
| 21 | Driver Monitor System/Performance Data Recorder |
| 22 | - |
| 23 | - |
| 24 | - |
| 25 | USB |
| 26 | - |
| 27 | - |
| 28 | - |
| 29 | - |
| 30 | - |
| 31 | Headlamp Level/Spare |
| 32 | - |
| 33 | Body ignition/IP ignition |
| 34 | Exhaust valve |
| 35 | Transmission Control Module Ignition/ Engine Control Module Ignition/Shift Ignition/Brake Ignition |
| 36 | Shift module |
| 37 | Body control module 1/Electronic park brake switch |
| 38 | Center stack module |
| 39 | Steering wheel controls |
| 40 | Body control module 2 |
| 41 | Body control module 3 |
| 42 | Body control module 4 |
| Circuit Breakers | |
| CB1 | Auxiliary power outlet 1 |
| CB2 | Auxiliary power outlet 2 |
| Relays | |
| 1 | Run after park/ Accessory |
| 2 | Run crank |
| 3 | - |
| 4 | - |
| 5 | - |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | Long range radar front sensor |
| 2 | Park/Daytime running lamps |
| 3 | Exterior lighting module 4 |
| 4 | Exterior lighting module 7 |
| 5 | Headlamp level |
| 6 | - |
| 7 | Electronic brake control module |
| 8 | Washer pump |
| 9 | - |
| 10 | - |
| 11 | - |
| 12 | Horn |
| 13 | Front wiper |
| 14 | Exterior lighting module 6 |
| 15 | Exterior lighting module 1 |
| 16 | Exterior lighting module 5 |
| 17 | Exterior lighting module 3 |
| 18 | Aero shutter |
| 19 | - |
| 20 | - |
| 21 | Virtual key system/ Power sounder module |
| 22 | Engine Control Module Battery |
| 23 | Transmission Control Module |
| 24 | Active engine mount |
| 25 | - |
| 26 | Engine control module |
| 27 | Injectors/Ignition 2 |
| 28 | Charged air cooler/Not used |
| 29 | Transmission aux oil pump/Transmission reverse lock out |
| 30 | Injectors/Ignition 1 |
| 31 | Emissions 1 |
| 32 | Emissions 2 |
| 33 | Starter solenoid |
| 34 | - |
| 35 | - |
| 36 | Starter pinion/Not used |
| 37 | AC clutch |
| 38 | - |
| 39 | - |
| 40 | - |
| 41 | - |
| 42 | Water pump/Not used |
| 43 | - |
| 44 | - |
| Relays | |
| 47 | - |
| 48 | Front wiper speed relay/Not used |
| 49 | Front wiper control relay |
| 51 | - |
| 52 | Engine control module relay |
| 53 | Starter solenoid relay |
| 54 | Starter pinion relay/Not used |
| 55 | - |
| 57 | AC clutch relay |
| 58 | - |
Luggage compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | Remote function actuator |
| 2 | - |
| 3 | Driver heated seat |
| 4 | Fuel tank zone module |
| 5 | - |
| 6 | - |
| 7 | - |
| 8 | - |
| 9 | - |
| 10 | Motor seat belt passenger |
| 11 | Canister vent solenoid |
| 12 | Sunroof |
| 13 | - |
| 14 | - |
| 15 | Passenger heated seat |
| 16 | - |
| 17 | Electronic suspension control |
| 18 | - |
| 19 | Motor seat belt driver |
| 20 | Rear defog |
| 21 | DC to DC transformer 2 |
| 22 | Driver power window / Door handle switch |
| 23 | External Object Calculating Module/ Front Camera Module/High Definition Localization Module/ Short Range Radar |
| 24 | Passenger power window / Door handle switch |
| 25 | - |
| 26 | Amplifier (V-Series Blackwing) |
| 27 | Rear drive control module |
| 28 | - |
| 29 | - |
| 30 | - |
| 31 | DC to DC transformer 1 |
| 32 | Transfer case electronic control |
| 33 | Central gateway module/Side blind zone alert |
| 34 | Video processing module |
| 35 | Hands free closure release |
| 36 | Exterior lighting module 2 |
| 37 | Passenger memory seat module |
| 38 | - |
| 39 | Right front/Right rear window |
| 40 | - |
| 41 | - |
| 42 | Amplifier |
| 43 | Park assist module |
| 44 | Driver memory seat module |
| 45 | OnStar |
| 46 | - |
| 47 | - |
| 48 | - |
| 49 | - |
| 50 | Driver seat |
| 51 | Left front/Left rear window |
| 52 | Passenger seat |
| Relays | |
| 53 | - |
| 54 | - |
| 55 | Run relay |
