Explore Cadillac CT5 fuse box diagrams for 2020–2025 models with relay assignments, fuse locations, panel layouts, and complete electrical system information. This article covers the Cadillac CT5 before the facelift , available from 2020 , and includes fuse box diagrams for Cadillac CT5 2020, 2021, 2022, 2023, 2024 and 2025 , along with details about the location of the fuse panels inside the vehicle and a clear explanation of the assignment of each fuse and relay (fuse layout).
The engine compartment fuse block is located on the driver side of the engine compartment.
Assignment of the fuses in the engine compartment
Fuse Data
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No. Description 1 Long Range Radar Front Sensor 2 2020-2024: Park / Daytime Running Lamps2025: –3 Exterior Lighting Module 4 4 Exterior Lighting Module 7 5 2020-2024: Headlamp Level2025: Spare6 – 7 Electronic Brake Control Module 8 Washer Pump 9 – 10 – 11 – 12 Horn 13 Front Wiper 14 2020-2024: Exterior Lighting Module 62025: Spare15 2020-2024: Exterior Lighting Module 12025: Spare16 Exterior Lighting Module 5 17 Exterior Lighting Module 3 18 Aero Shutter 19 – 20 – 21 2020-2024: Virtual Key System / Power Sounder Module2025: Automatic Light Module / Power Sounder Module22 2020: –2021: Engine Control Module2022-2025: Engine Control Module Battery23 2020, 2022-2025: Transmission Control Module2021: Transmission Control Module / Transmission Reverse Lock Out24 Active Engine Mount 25 – 26 Engine Control Module 27 Injectors / Ignition 2 28 Charged Air Cooler / Not Used 29 2020: Transmission Coolant Pump2021-2025: Transmission Aux Oil Pump / Transmission Reverse Lock Out30 Injectors / Ignition 1 31 Emissions 1 32 Emissions 2 33 Starter Solenoid 34 – 35 2020: Coolant Pump2021-2025: –36 Starter Pinion / Not Used 37 2020-2024: AC Clutch2025: –38 – 39 – 40 – 41 – 42 Water Pump / Not Used 43 – 44 –
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Assignment of the relays in the engine compartment
Fuse Data
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No. Description 47 – 48 Front Wiper Speed / Not Used 49 Front Wiper Control 51 – 52 Engine Control Module 53 Starter Solenoid 54 Starter Pinion / Not Used 55 – 57 AC Clutch 58 –
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The instrument panel fuse block is located at the driver-side end of the instrument panel. To reach the fuses, remove the end panel by carefully prying near each clip with a plastic tool, starting at the point shown.
Assignment of the fuses in the passenger compartment
Fuse Data
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No. Description 1 – 2 Heating, Ventilation, and Air Conditioning Blower 3 – 4 – 5 2020: Theft Deterrent / Universal Garage Door Opener2021-2025: Theft Deterrent / Universal Garage Door Opener / Overhead Console / Rain Sensor6 – 7 2020-2024: Air Quality Ionizer2025: Spare8 Heated Steering Wheel 9 – 10 Electronic Steering Column Lock 1 11 – 12 – 13 – 14 – 15 – 16 – 17 – 18 2020: Display / Infotainment / USB2021-2025: Display / Infotainment / USB / Multi-function Control Module19 2020: Airbag / Automatic Occupant Sensing / Data Link Connection / Wireless Charging Module2021: Airbag / Automatic Occupant Sensing / Data Link Connection / Wireless Charging Module / Virtual Key Module2022-2024: Sensing and Diagnostic Module / Automatic Occupant Sensing / Data Link Connection / Wireless Charging Module / Virtual Key Module2025: Sensing and Diagnostic Module / Automatic Occupant Sensing / Data Link Connection / Wireless Charging Module20 Power Steering Column Module / Electronic Steering Column Lock 2 21 2020: –2021-2024: Driver Monitor System / Performance Data Recorder2025: Performance Data Recorder / Spare22 – 23 – 24 – 25 2020-2024: USB2025: Retained Accessory Power / USB26 – 27 2020-2023, 2025: –2024: Headlamp LH28 2020-2023, 2025: –2024: Headlamp RH29 – 30 – 31 2020-2023: Headlamp Level2024-2025: Headlamp Level / Spare32 – 33 Body Ignition / IP Ignition 34 Exhaust Valve 35 Transmission Control Module Ignition / Engine Control Module Ignition / Shift Ignition / Brake Ignition 36 2020-2024: Shift Module2025: Body Control Module 137 2020-2024: Body Control Module 1 / Electronic Park Brake Switch2025: Headlamp LH RH38 2020-2024: Center Stack Module2025: Virtual Cockpit Unit39 Steering Wheel Controls 40 Body Control Module 2 41 Body Control Module 3 42 Body Control Module 4
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Assignment of the circuit breakers in the passenger compartment
Fuse Data
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No. Description CB1 Auxiliary Power Outlet 1 CB2 Auxiliary Power Outlet 2
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Assignment of the relays in the passenger compartment
Fuse Data
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No. Description 1 Run After Park / Accessory 2 Run Crank 3 – 4 – 5 –
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The fuse block in the rear compartment is located behind a cover on the driver side of the rear compartment.
Assignment of the fuses in the luggage compartment
Fuse Data
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No. Description 1 Remote Function Actuator 2 2020: Engine Control Module2021-2025: –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 2020-2023: –2024-2025: Exterior Lighting Module 117 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: External Object Calculating Module / Front Camera Module2021-2025: External Object Calculating Module / Front Camera Module / High Definition Localization Module / Short Range Radar24 Passenger Power Window / Door Handle Switch 25 – 26 2020: Trailer2021: –2022-2024: Amplifier (V-Series Blackwing)2025: Spare27 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: Trailer 22021-2023: –2024-2025: Amplifier39 Right Front / Right Rear Window 40 – 41 – 42 Amplifier 43 Park Assist Module 44 Driver Memory Seat Module 45 OnStar 46 – 47 2020-2023: –2024: Exterior Lighting Module 62025: Exterior Lighting Module 748 – 49 2020: Trailer2021-2025: –50 Driver Seat 51 Left Front / Left Rear Window 52 Passenger Seat
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Assignment of the relays in the luggage compartment
Fuse Data
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No. Description 53 – 54 – 55 Run
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