The Cadillac CT5, manufactured from 2020 to 2022, is a mid-size luxury sedan known for its blend of performance, comfort, and advanced technology features. Its electrical system, which includes the fuse box and relay components, is crucial for ensuring the vehicle operates smoothly and reliably.
The fuse box in the Cadillac CT5 from 2020 to 2022 houses various fuses designed to protect specific electrical circuits throughout the vehicle. These circuits power essential components such as the engine control module, lighting systems, infotainment features, climate control, and more. Fuses are essential as they interrupt the electrical flow in case of an overload or short circuit, preventing damage to sensitive components.
Relays in the Cadillac CT5 act as electrically operated switches that control high-current circuits. They facilitate the precise activation and deactivation of functions like the starter motor, fuel pump, air conditioning compressor, and power windows or seats. Efficient management of power distribution by relays contributes significantly to the vehicle’s overall performance and reliability.
Regular inspection and maintenance of the fuse box and relays are necessary to ensure the Cadillac CT5 from 2020 to 2022 operates smoothly. This includes checking fuses for signs of wear or damage, ensuring secure relay connections, and promptly addressing any electrical issues that arise. Proper care of these components helps maintain the vehicle’s electrical integrity, enhancing safety and driving satisfaction for owners of the Cadillac CT5 from 2020 to 2022.
MUST READ: DYI – How to Check Car Fuses?
(2020-2022) Cadillac CT5 fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Cadillac CT5 2020-2022 fuse assignment
- Cigar lighter (power outlet) fuses in the Cadillac CT5 are the Circuit Breakers CB1 and CB2 in the Instrument panel fuse box.
Year of production: 2020, 2021, 2022
Passenger compartment
The fuse box is located on the driver side of the instrument panel.
To access, remove the end cover by gently prying with a plastic tool near each clip, beginning at the point shown.
To install the cover, insert the tabs on the back of the cover into the slots in the instrument panel. Align the clips with the slots in the instrument panel, and press the cover into place.
Engine compartment
Lift the cover to access the fuses.
Luggage compartment
The rear compartment fuse block is behind a cover on the driver’s side of the rear compartment.
Fuse box diagrams
Passenger compartment
Assignment of the fuses in the Passenger compartment (2020, 2021, 2022)
| № | Description |
|---|---|
| 1 | — |
| 2 | HVAC blower |
| 3 | — |
| 4 | — |
| 5 | 2020-2021: Theft deterrent/ Universal garage door opener 2022: 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 | 2020-2021: Display/ Infotainment/ USB 2022: Display/ Infotainment/ USB/ Multi-function Control Module |
| 19 | 2020-2021: Airbag/ Automatic occupant sensing/ Data link connection/ Wireless charging module 2022: 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 | 2022: Driver Monitor System/ Performance Data Recorder |
| 22 | — |
| 23 | — |
| 24 | — |
| 25 | USB |
| 26 | — |
| 27 | — |
| 28 | — |
| 29 | — |
| 30 | — |
| 31 | Headlamp level |
| 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 |
| CB1 | Auxiliary power outlet 1 (Circuit Breaker) |
| CB2 | Auxiliary power outlet 2 (Circuit Breaker) |
| Relays | |
| 1 | Run after park/ Accessory |
| 2 | Run crank |
| 3 | — |
| 4 | — |
| 5 | — |
Engine compartment
Assignment of the fuses and relays in the engine compartment (2020, 2021, 2022)
| № | Description |
|---|---|
| 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 | 2022: 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 |
| 29 | 2020-2021: Transmission coolant pump 2022: Transmission Aux Oil Pump/ Transmission Reverse Lock Out |
| 30 | Injectors/Ignition 1 |
| 31 | Emissions 1 |
| 32 | Emissions 2 |
| 33 | Starter solenoid |
| 34 | — |
| 35 | 2020-2021: Coolant pump |
| 36 | Starter pinion |
| 37 | AC clutch |
| 38 | — |
| 39 | — |
| 40 | — |
| 41 | — |
| 42 | Water pump |
| 43 | — |
| 44 | — |
| Relays | |
| 47 | — |
| 48 | Front wiper speed |
| 49 | Front wiper control |
| 51 | — |
| 52 | Engine control module |
| 53 | Starter solenoid |
| 54 | Starter pinion |
| 55 | — |
| 57 | AC clutch |
| 58 | — |
Luggage compartment
Assignment of the fuses and relays in the Rear compartment (2020, 2021, 2022)
| № | Description |
|---|---|
| 1 | Remote function actuator |
| 2 | 2020-2021: Engine control module |
| 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 | 2020-2021: External object calculating module/ Front camera module 2022: External Object Calculating Module/ Front Camera Module/ High Definition Localization Module/ Short Range Radar |
| 24 | Passenger Power Window/ Door Handle Switch |
| 25 | — |
| 26 | 2020-2021: Trailer 2022: 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 | 2020-2021: Trailer 2 |
| 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 | 2020-2021: Trailer |
| 50 | Driver seat |
| 51 | Left front/Left rear window |
| 52 | Passenger seat |
| Relays | |
| 53 | — |
| 54 | — |
| 55 | Run |
Conclusion
For owners and enthusiasts of classic Cadillac CT5 2020-2022, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Cadillac’s craftsmanship and innovation in the automotive industry during that era.
