Cadillac XT4 (2019 - 2025) Fuse Box Location & Diagrams

Cadillac XT4 (2019 – 2025) Fuse Box Location & Diagrams

Cadillac XT4 (2019 – 2025) Fuse Box Location & Diagrams

Find the fuse box locations and complete fuse diagrams for the Cadillac XT4 (2019–2025). This guide helps you quickly identify fuse assignments and relays for troubleshooting electrical issues and replacing blown fuses safely.

Fuse Box Location

Passenger Compartment Fuse Box

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

Passenger Compartment Location

Engine Compartment Fuse Box

Engine Compartment Location

Fuse Box Diagrams

Passenger Compartment Fuse Box

Passenger Compartment Diagrams
Cadillac XT4 (2019-2021)
№Usage
F1Left power window
F2Right power window
F3Not Used
F4DC DC battery 2/1
F5Auxiliary power outlet – cargo
F6Heated seat battery 1
F7Heated seat battery 2
F8Body control module 3
F9Electric parking brake switch
F10Body control module 2 (stop/start)
F11Not Used
F12Not Used
F13Not Used
F14Not Used
F15Transmission control module (stop/start)
F16Amplifier
F17Not Used
F18Video processing module
F19Power steering column
F20Body control module 6
F21Body control module 4
F22Body control module 7
F23Electric steering column lock
F24Airbag
F25Data link connector
F26Not Used
F27Not Used
F28Not Used
F29Body control module 8
F30Overhead console
F31Steering wheel control
F32Not Used
F33Heating ventilation/Air conditioning
F34Central gateway module (CGM)
F35Heated switch
F36Charger
F37Auxiliary power outlet – front
F38OnStar
F39Display
F40Obstacle detection
F41Body control module 1 (stop/start)
F42Radio
F43Auxiliary power outlet – console (circuit breaker)
F44Auxiliary power outlet – console
Relays
K1Not Used
K2Retained accessory power
K32021: Content theft
K4Not Used
K5Not Used
Cadillac XT4 (2022 & 2023)
№Usage
F1Left Power Window
F2Right Power Window
F3—
F4Direct Current to Direct Current Converter 2
F5Auxiliary Power Outlet – Cargo
F6Heated Seat Battery 1
F7Heated Seat Battery 2
F8Body 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
F9Electric Park Brake
F10Body 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
F11—
F12—
F13—
F14—
F15Transmission Control Module (Stop/ Start)
F16Amplifier
F17
F18Video Processing Module
F19Power Steering Column
F20Body Control Module 6 – LED Backlight Control, Interior Lighting Inadvertent Load Control Signal, Fuel Door Lock Control Signal, LED Backlight Control Signal
F21Body 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
F22Body 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
F23—
F24Airbag
F25Data Link Connector
F26—
F27—
F28—
F29Body 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
F30Overhead Console
F31Steering Wheel Controls
F32—
F33Heating Ventilation and Air Conditioning Control Module
F34Central Gateway Module
F35Heated Seat Switch/Hazard Switch
F36Wireless Charger Module/USB Charge Port
F37—
F38OnStar
F39Shifter Interface Board/Center Stack/Head Up Display/ Instrument Panel Cluster/HVAC Display
F40Long Range Radar Sensor/ Ultrasonic Park Assist Module/Camera Module/External Object Calculating Module/ Side Blind Zone Alert Modules/Front Camera Module
F41Body 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
F42Radio
F43Console Auxiliary Power Outlet (Circuit Breaker)
F44Front Console Auxiliary Power Outlet
Relay
K1—
K2Retained Accessory Power
K3—
K4—
K5—
Cadillac XT4 (2024 & 2025)

Passenger Compartment Diagrams (2024-2025)

№Usage
F1Blower Motor
F2ELM 1 – Exterior Lighting Module 1
F3Column Lock
F4ELM 2 – Exterior Lighting Module 2
F5BCM 2 – Body Control Module 2
F6Amplifier
F7Clock Spring
F8DLC – Data Link Connector
F9BCM 1 – Body Control Module 1
SIB – Shifter Interface Board
F10Headliner/Auxiliary Switch
F11Display and HVAC
F12Steering Column Lock
F13Video Driving Monitoring System (DMS) / Safety 2
F14RC MISC 3/ECM – Ride Control Miscellaneous 3/ Electronic Control Module
F15Rear Wiper
F16Cargo APO – Cargo Auxiliary Power Outlet
F17Sensing Diagnostic Module (SDM) / Safety 1
F18RC MISC1/MISC2 -Ride Control Miscellaneous!/ Miscellaneous 2
F19Exterior Lighting Module (ELM) TR6
F20Central Gateway Module(CGM) / Telematics (OnStar)
F21–
F22European Trailer
F23Auxiliary Power Outlet (APO) Cigar
F24Wireless Charger
F25USB
F26ELM 6 – Exterior Lighting Module 6
F27VCU AUX JACK – Vehicle Communication Unit Auxiliary Jack
F28ELM 7 – Exterior Lighting Module 7
F29–
F30–
F31BCM 3 – Body Control Module 3
F32HSWM – Heated Steering Wheel Module
F33–
F34STEERING CLMN ADJ MDL – Steering Column Adjacent Module
F35Amplifier
F36DC/DC BAH 2
F37–
F38–
F39BCM 4 – Body Control Module 4
F40–
Relay
CB01Auxiliary Power Outlet (APO) Row 2
CB02Auxiliary Power Outlet (APO) Row 1

Engine Compartment Fuse Box

engine compartment fuse box (2022-2023)

Cadillac XT4 (2019-2021)
№Usage
32019-2020: Antilock brake system pump
2021: Electronic brake control module
52019: Not Used
2020-2021: Trailer brake
6Rear closure
7Trailer stop/Turn LH
8Memory seat module
9Pedestrian friendly alert function
10Semi-active damping system
112019: DC-DC Battery 1
2020-2021: DC-DC Battery 1/2
12Rear defogger
13Heated mirror
14Not Used
15Passive entry passive start
16Front wiper
17Passenger power seat
18Power liftgate module
19Driver power seat
21Sunroof
22Rear wiper
232019: Auto headlamp leveling/Canister vent solenoid
2020-2021: Trailer interface module 2
26Transmission control module/Ignition
27Instrument panel body/Ignition
28Rear wiper
292019: Seat ventilation
2020-2021: Trailer ignition
302019-2020: Malfunction indicator lamp
2021: Malfunction indicator lamp start/stop Trailer interface module ignition
32Rear drive control module 1
332019-2020: Front heated seat
34Handsfree/Window switch
352019: Not Used
2020-2021: Diesel exhaust fuel heater
36Fuel module
39Massage
40Steering column lock
41Not Used
43Heated steering wheel
442019: Not Used
2020: Seat ventilation
2021: Seat ventilation / Front heated seat
46Engine control module/Ignition
48Rear drive control module 2
49Heating ventilation/ Air conditioning blower motor
50Not Used
51Not Used
54Not Used
55Not Used
56Starter motor
57Not Used
58Not Used
59High-beam headlamps
602019: Not Used
2020-2021: Trailer interface module 1
61Not Used
62Not Used
63Not Used
65Air conditioning control
67Not Used
68Not Used
69Not Used
70Trailer park lamp
72Starter pinion
75Engine control module
76Powertrain off engine
78Horn
79Washer pump
81Transmission control module/Engine control module
822019: Not Used
2020-2021: Nitrogen oxide sensor
83Ignition coil
84Powertrain on engine
85Shunt
86Shunt
872019: Not Used
2020-2021: Diesel fuel heater 1
88Aeroshutter
892019: Not Used
2020-2021: Selective catalytic reduction module
92Trailer stop/Turn right
932019: Not Used
2020-2021: Automatic headlamp leveling/Canister vent solenoid
952019: Not Used
2020-2021: Smart sensors
962019: Not Used
2020-2021: Diesel fuel heater 2
99Not Used
Relays
4Not Used
20Rear defogger
25Front wiper control
31Run/Crank
37Front wiper speed
42Not Used
64Starter motor
66Powertrain
71Trailer park lamp
73Air conditioning control
80Starter pinion
902019: Not Used
2020-2021: Powertrain sensor
942019: Not Used
2020-2021: Diesel exhaust fuel heater
982019: Not Used
2020-2021: Diesel fuel heater
Cadillac XT4 (2022 & 2023)
Fuse/Relay No.Usage
3EBCM – Electronic Brake Control Module
52022: Trailer Brake – Not Used / 2023: –
62022: REAR CLOSR – Spare / 2023: –
7Left Trailer Stop/Turn Lamp
8Memory Seat Module (Driver & Passenger)
92022: PFAF – Not Used / 2023: –
10Semi-active Damping System / Spare
112022: DC DC BAT 1/2 – DC-DC Converter 1 / 2023: DC DC BAT 2 – DC-DC Converter 2
12Rear Window Defogger
13Heated Outside Rear View Mirrors
14–
15Passive Entry Passive Start (PEPS)
16Front Wiper(s)
17Passenger Power Seat
182022: Power Liftgate / 2023: Liftgate Motor / Spare
19Driver Power Seat / Memory Seat Module / Driver Seat Massage
20 (Relay)Rear Defogger / Outside Mirror Defogger
21Power Sunroof
22–
232022: TIM 2 – Not Used / 2023: –
25 (Relay)Front Wiper Control
26Transmission Control Module Ignition
272022: IP Body Ignition / 2023: Miscellaneous 1
28Rear Wiper
292022: Trailer Ignition – Not Used / 2023: –
302022: MIL SS/TIM Ignition / 2023: Miscellaneous 2
31 (Relay)Run / Crank
322022: Rear Drive Control Module 1 / 2023: RDCM 2 / Spare
33Front Heated Seat Power 2 / Spare
342022: Handsfree/Liftgate/Window Switch / 2023: HFCR Module/Liftgate/Window Switch
352022: DEFC 2 / Not Used / 2023: –
362022: Fuel Module / 2023: Fuel Tank Zone Module
37 (Relay)Front Wiper Speed
39Driver & Passenger Seat Massage
402022: Spare / 2023: –
41–
42 (Relay)–
43Heated Steering Wheel
44Front Heated/Vented Seats & Rear Heated Seats
46Engine Control Module Ignition
482022: Rear Drive Control Module 2 / 2023: RDCM 1 / Spare
49HVAC Blower Motor
50Spare
51Spare
54Spare
55Spare
56Starter Motor
57–
58–
59High Beam Headlamps
602022: TIM 1 – Not Used / 2023: –
61Spare
62Spare
63Spare
64 (Relay)Starter Motor
652022: A/C Clutch / 2023: A/C Compressor Clutch
66 (Relay)Powertrain
67Spare
68Spare
69–
70Trailer Park Lamp(s)
71 (Relay)Trailer Park Lamps
72Starter Pinion
73 (Relay)A/C Control
74–
752022: ECM Main / 2023: ECM Powertrain Ignition 2
762022: Powertrain Off Engine (ECM Ignition 1) / 2023: ECM Powertrain Ignition 1
78Horn
79Washer Pump(s)
80 (Relay)Starter Pinion
812022: TCM/ECM/Cool Pump / 2023: ECM Battery / Spare
822022: NOx Sensor – Not Used / 2023: –
83Ignition Coils
84Engine Sensors/Solenoids (2023 adds Humidity Sensor)
85Shunt
862022: Shunt / 2023: –
872022: Diesel Fuel Heater 1 – Not Used / 2023: –
882022: Aeroshutter / 2023: Aeroshutter / Spare
892022: SCR Module – Not Used / 2023: –
90 (Relay)2022: Powertrain Sensor – Not Used / 2023: –
922022: Right Trailer Stop/Turn Lamp / 2023: Right Trailer Stop/Turn Lamp / Spare
93Canister Vent Solenoid
94 (Relay)2022: DEFC – Not Used / 2023: –
952022: Smart Sensors – Not Used / 2023: –
962022: Diesel Fuel Heater 2 – Not Used / 2023: –
98 (Relay)2022: Diesel Fuel Heater – Not Used / 2023: –
99–
Cadillac XT4 (2024 & 2025)

engine compartment (2024-2025)

№Usage
1Spare
2Aeroshutter
BSpare
4Spare
5Spare
6–
7ECM 2 – Engine Control Module 2
ECM 3 – Engine Control Module 3
8ECM MAIN – Engine Control Module Main
9–
10OFF ENG
11OFF ENG 2 / OFF ENG 1
12CAC – Charge Air Cooler
ECM – Engine Control Module
13TCM – Transmission Control Module
14–
15–
16–
17A/C Control
18–
19Starter Pinion
20MCU – Microprocessor Control Unit
21–
22–
23–
24–
25Starter Motor
26Spare
27–
28–
29–
30–
31–
32Spare
33Spare
34ELM 5 – Exterior Lighting Module 5
35Power Sounder
36ELM 4 – Exterior Lighting Module 4
37ELM 3 – Exterior Lighting Module 3
38MSM_E – Memory Seat Module
39BSM – Battery State Module
40Front Window Switch
41RDCM BATT2 – Rear Drive Control Module Battery 2
42Headlamp Right and Headlamp Left
43FRT HTD SEAT MDL – Front Heated Seat Module
44RFAM & AFL/AHL/RDCM BAT 2 – Radio Frequency Actuator Module and Adaptive Forward Lighting/ Automatic Headlamp Leveling/Rear Drive Control Module Battery 2
46–
47–
48DC DC BAT 2 – Direct Current Direct Current Battery 2
49–
50MTR WDW LIFTER LT – Motor Window Lifter Left
51–
52Passenger Power Seat
53–
54TIM1 – Trailer Interface Module 1
55TIM2 – Trailer Interface Module 2
56Trailer Park Lamps
57RDCM BATT1 – Rear Drive Control Module Battery 1
58Driver Power Seat
59EBCM – Electronic Brake Control Module
60Horn
61Rear Defog
62Front Wiper
63Power Tailgate
64MTR WDW LIFTER RT -Motor Window Lifter Right
65–
66Sunroof
67Trailer Run
68Spare
69Spare
70–
71–
72FTZM – Fuel Tank Zone Module
73Handsfree Closure
74–
75Spare
76Spare
77Spare
78Trailer Stop/Turn Left and Right
79TCM (DC to DC) -Transmission Control Module
80–
81SADS – Semi Active Dampening Suspension
82–
83Washer Pump

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