Cadillac XT4 | 2019-2023

Find Cadillac XT4 fuse box diagrams for 2019–2023 models with relay assignments, fuse locations, panel placement, and electrical layout information. This article covers the subcompact luxury crossover SUV Cadillac XT4 before the facelift, produced from 2019, and includes fuse box diagrams for Cadillac XT4 2019, 2020, 2021, 2022 and 2023, 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).

Engine Compartment

Fuse Box Location

It is located on the driver side in the engine compartment.

Fuse Box Diagram

Fuses

Assignment of the fuses in the engine compartment

Fuse Data
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No.TypeDescription
3FMX/JCase2019-2020: Antilock brake system pump
2021-2023: Electronic Brake Control Module
5FMX/JCase2019: Not Used
2020-2021: Trailer brake
2022-2023: Not Used
6Mini2019-2021: Rear closure
2022-2023: Spare
7MiniLeft Trailer Stop/Turn Lamp
8MiniMemory Seat Module, Driver and Passenger
9Mini2019-2021: Pedestrian friendly alert function
2022-2023: Not Used
10MiniSemi-active Damping System/Spare
11FMX/JCaseDirect Current to Direct Current Converter 1
12FMX/JCaseRear Window Defogger
13MiniOutside Rear View Mirrors Defogger
14MiniNot Used
15MiniPassive Entry Passive Start Module
16FMM/MCaseFront Wiper
17FMM/MCasePassenger Power Seat
18FMM/MCasePower liftgate module
19FMM/MCaseDriver Power Seat/ Memory Seat Module/ Driver Seat Massage Control
21MiniPower Sunroof
22Mini2019-2021: Rear wiper
2022-2023: Not Used
23Mini2019: Auto headlamp leveling/Canister vent solenoid
2020-2021: Trailer interface module 2
2022-2023: Not Used
26MiniTransmission Control Module/Ignition
27Mini2019-2021: Instrument panel body/Ignition
2022-2023: Inside Rear View Mirror, Shifter Interface Board Module Run/Crank, Central Gateway Module Run/Crank, Heating Ventilation and Air Conditioning Control Module Run/Crank ignition 3
28MiniRear Wiper
29Mini2019: Seat ventilation
2020-2021: Trailer ignition
2022-2023: Not Used
30Mini2019-2020: Malfunction indicator lamp
2021: Malfunction indicator lamp start/stop Trailer interface module ignition
2022-2023: Fuel Tank Zone Module Run/Crank, Direct Current to Direct Current Transformer Run/Crank, Electronic Brake Control Module Run/Crank, Instrument Panel Cluster Run/Crank
32MiniRear Drive Control Module 1
33ATOFront Heated Seat Power 2
34ATO2019-2021: Handsfree/Window switch
2022-2023: Liftgate Module / Front Window Switches
35ATODiesel exhaust fuel heater
36MiniFuel Tank Zone Module
39MiniDriver Seat Massage / Passenger Seat Massage
40Mini2019-2021: Steering column lock
2022-2023: Not Used
41ATONot Used
43MiniHeated Steering Wheel
44Mini2019: Not Used
2020: Seat ventilation
2021: Seat ventilation / Front heated seat
2022-2023: Front Heated Seat Power Feed 1 / Front Vented Seats / Rear Heated Seats
46MiniEngine control module/Ignition
48FMX/JCaseRear Drive Control Module 2
49FMX/JCaseHeating Ventilation and Air Conditioning Control Blower Motor
50Mini2019-2021: Not Used
2022-2023: Spare
51Mini2019-2021: Not Used
2022-2023: Spare
54Mini2019-2021: Not Used
2022-2023: Spare
55Mini2019-2021: Not Used
2022-2023: Spare
56FMM/MCaseStarter Motor
57FMX/JCaseNot Used
58FMX/JCaseNot Used
59ATOHigh-beam headlamps
60FMX/JCase2019: Not Used
2020-2021: Trailer interface module 1
2022-2023: Not Used
61Mini2019-2021: Not Used
2022-2023: Spare
62Mini2019-2021: Not Used
2022-2023: Spare
63Mini2019-2021: Not Used
2022-2023: Spare
65MiniAir Conditioning Clutch
67ATO2019-2021: Not Used
2022-2023: Spare
68ATO2019-2021: Not Used
2022-2023: Spare
69MiniNot Used
70MiniTrailer Park Lamp
72FMX/JCaseStarter pinion
75MiniEngine control module
76Mini2019-2021: Powertrain off engine
2022-2023: Powertrain Off Engine, Engine Control Module Power Train Ignition 1
78MiniHorn
79MiniFront and Rear Washer Pump
81ATO2019-2021: Transmission control module/Engine control module
2022-2023: Engine Control Module Battery/Spare
82—2019: Not Used
2020-2021: Nitrogen oxide sensor
2022-2023: Not Used
83ATOIgnition coil
84ATO2019-2021: Powertrain on engine
2022-2023: Canister Purge Solenoid / Step Cam Exhaust Solenoid Cylinder 2 and 3 / Step Cam Intake Cylinder Solenoids / Turbo Bypass Solenoid / Oxygen Sensor (Pre) / O2 Heater / Oxygen Heated Sensor / Mass Airflow / Inlet Air Temperature / Throttle Inlet Absolute Pressure / Coolant Flow Control Valve
85FMX/JCaseShunt
86FMX/JCaseShunt
87FMX/JCaseDiesel fuel heater 1
88MiniAeroshutter
89Mini2019: Not Used
2020-2021: Selective catalytic reduction module
2022-2023: Not Used
92Mini2019-2021: Trailer stop/Turn right
2022-2023: Not Used
93Mini2019: Not Used
2020-2021: Automatic headlamp leveling/Canister vent solenoid
2022-2023: Canister Vent Solenoid
95Mini2019: Not Used
2020-2021: Smart sensors
2022-2023: Not Used
96FMM/MCaseDiesel fuel heater 2
99MiniNot Used

Relays

Assignment of the relays in the engine compartment

Fuse Data
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No.Description
4Not Used
20Rear Defogger / Outside Rear View Mirrors Defogger
25Front wiper control
31Run/Crank
37Front wiper speed
42Not Used
64Starter motor
66Powertrain
71Trailer park lamps
73Air conditioning controls
80Starter pinion
902019: Not Used
2020-2021: Powertrain sensor
2022-2023: Not Used
94Diesel exhaust fuel heater
98Diesel fuel heater

Passenger Compartment

Fuse Box Location

The fuse box is located behind the cover on the driver’s side of the instrument panel.

  • To access, remove the panel, starting at the top. Once clips are disengaged, the tabs along the bottom of the door can be disengaged from the instrument panel to remove the door.
  • To reinstall the door, place the bottom tabs into the slots, and rotate the door into position, engaging the clips.

Fuse Box Diagram

Fuses

Assignment of the fuses in the instrument panel

Fuse Data
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No.TypeDescription
1FMM/MCaseLeft power window
2FMM/MCaseRight power window
3FMM/MCaseNot Used
4FMX/JCase2019-2021: DC DC battery 2/1
2022-2023: DC/DC: Direct Current to Direct Current Converter 2
5MiniAuxiliary power outlet – cargo
6MiniHeated seat battery 1
7MiniHeated seat battery 2
8MiniBody Control Module 3 – LED Headlamp Low Beam Right Control Signal, Right Front Turn Lamp Control Signal, Left Front Side Marker and Auxiliary Park, Left Rear Tail/Side Marker Control Signal, Left Daytime Running Lamps Control Signal
9MiniElectric parking brake / Electric parking brake switch
10MiniBody Control Module 2 (Stop/Start) – Interior Lamps Control Signal, Door Handle Puddle Lamp (LED), Left Cornering Lamp, Right Cornering Lamp, Interior Lamps Control Signal, Backup Lamp Supply Voltage, License Plate Lamp Control Signal, Rear Closure Cargo Lamp Control Signal, Center High Mounted Stop Lamp LED Lamp Control Signal
11MiniNot Used
12MiniNot Used
13MiniNot Used
14MiniNot Used
15MiniTransmission control module (stop/start)
16MiniAmplifier
17MiniNot Used
18MiniVideo processing module
19MiniPower steering column
20MiniBody Control Module 6 – LED Backlight Control, Interior Lighting Inadvertent Load Control Signal, Fuel Door Lock Control Signal, LED Backlight Control Signal
21MiniBody Control Module 4 – LED Headlamp Low Beam Left Control Signal, Right Front Side Marker and Auxiliary Park, Right Rear Tail/ Side Marker Control Signal, Left Rear Stop Lamp Control Signal, Left Rear Stop/Turn Lamp Control Signal, Right DRL Control Signal
22MiniBody Control Module 7 – Right Rear Stop Lamp Control Signal, Right Rear Stop/ Turn Lamp Control Signal, Left Front Turn Lamp Control Signal, Right Rear Turn Control Signal
23Mini2019-2021: Electric steering column lock
2022-2023: Not Used
24MiniAirbag
25MiniData link connector
26MiniNot Used
27FMX/JCaseNot Used
28FMX/JCaseNot Used
29MiniBody Control Module 8 – Internal Driver/Fuel Door Unlock Relay Control Signal, Internal Non-Driver Door Lock Relay Control Signal, Internal All Door Unlock Relay Control Signal
30MiniOverhead console
31ATOSteering wheel control
32ATONot Used
33MiniHeating Ventilation and Air Conditioning Control Module
34MiniCentral gateway module (CGM)
35Mini2019-2021: Heated switch
2022-2023: Heated Seat Switch / Hazard Switch
36MiniWireless Charger Module / USB Charge Port
37Mini2019-2021: Auxiliary power outlet – front
2022-2023: Not Used
38MiniOnStar
39MiniShifter Interface Board / Center Stack / Head Up Display / Instrument Panel Cluster / HVAC Display
40MiniObstacle detection: Long Range Radar Sensor / Ultrasonic Park Assist Module / Camera Module / External Object Calculating Module / Side Blind Zone Alert Modules / Front Camera Module
41MiniBody Control Module 1 (Stop/Start) – LED Indicator Lighting Control, Accessory LED Control, Run-Start LED Control, Ambient Lighting LED Control 2, Liftgate Latch Motor Control Signal, Rear Wiper Control Signal, High Beam Lamp Control (Direct Drive), Rear Fog LED Lamp Control Signal, Windshield Washer Pump Motor Control Signal, Run/Crank Relay Control Signal, ECM/TCM ACC Wakeup Control Signal, Left Rear Turn Control Signal, Rear Wiper Wash Pump Control Signal, Brake Pedal Apply Signal
42MiniRadio
43Circuit breakerConsole Auxiliary Power Outlet
44MiniFront Console Auxiliary Power Outlet

Relays

Assignment of the relays in the instrument panel

Fuse Data
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No.Description
K1Not Used
K2Retained accessory power
K32021: Content theft
K4Not Used
K5Not Used

FAQ

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