Cadillac XT4 Fuse Box: What Each Fuse Does
From the 2025 Cadillac XT4 owner's manual. 2 fuse boxes listed.
Engine compartment fuse block
| Fuse | Circuit |
|---|---|
| 13 | TCM – Transmission Control Module |
| 14 | – |
| 15 | – |
| 16 | – |
| 17 | A/C Control |
| 18 | – |
| 19 | Starter Pinion |
| 20 | MCU – Microprocessor Control Unit |
| 21 | – |
| 22 | – |
| 23 | – |
| 24 | – |
| 25 | Starter Motor |
| 26 | Spare |
| 27 | – |
| 28 | – |
| 29 | – |
| 30 | – |
| 31 | – |
| 32 | Spare |
| 33 | Spare |
| 34 | ELM 5 – Exterior Lighting Module 5 |
| 35 | Power Sounder |
| 36 | ELM 4 – Exterior Lighting Module 4 |
| 37 | ELM 3 – Exterior Lighting Module 3 |
| 38 | MSM_E – Memory Seat Module |
| 39 | BSM – Battery State Module |
| 40 | – Front Window Switch |
| 41 | RDCM BATT 2 – Rear Drive Control Module Battery 2 |
| 42 | Headlamp Right and Headlamp Left |
| 43 | FRT HTD SEAT MDL – Front Heated Seat Module |
| 44 | RFAM & AFL/RDCM BAT 2 – Radio Frequency Actuator Module and Adaptive Forward Lighting/Rear Drive Control Module Battery 2 |
| 46 | – |
| 47 | – |
| 48 | DC DC BAT 2 – Direct Current Direct Current Battery 2 |
| 49 | – |
| 50 | MTR WDW LIFTER LT – Motor Window Lifter Left |
| 51 | – |
| 52 | Passenger Power Seat |
| 53 | – |
| 54 | TIM 1 – Trailer Interface Module 1 |
| 55 | TIM 2 – Trailer Interface Module 2 |
| 56 | Trailer Park Lamps |
| 57 | RDCM BATT 1 – Rear Drive Control Module Battery 1 |
| 58 | Driver Power Seat |
| 59 | EBCM – Electronic Brake Control Module |
| 60 | Horn |
| 61 | Rear Defog |
| 62 | Front Wiper |
| 63 | Power Tailgate |
| 64 | MTR WDW LIFTER RT – Motor Window Lifter Right |
| 65 | – |
| 66 | Sunroof |
| 67 | Trailer Run |
| 68 | Spare |
| 69 | Spare |
| 70 | – |
| 71 | – |
| 72 | FTZM – Fuel Tank Zone Module |
| 73 | Handsfree Closure |
| 74 | – |
| 75 | Spare |
| 76 | Spare |
| 77 | Spare |
| 78 | Trailer Stop/Turn Left and Right |
| 79 | TCM (DC to DC) – Transmission Control Module |
| 80 | – |
| 81 | SADS – Semi Active Dampening Suspension |
| 82 | – |
| 83 | Washer Pump |
Instrument panel fuse block
| Fuse | Circuit |
|---|---|
| F1 | Blower Motor |
| F2 | ELM 1 – Exterior Lighting Module 1 |
| F3 | Column Lock |
| F4 | ELM 2 – Exterior Lighting Module 2 |
| F5 | BCM 2 – Body Control Module 2 |
| F6 | Amplifier |
| F7 | Clock Spring |
| F8 | DLC – Data Link Connector |
| F9 | BCM 1 – Body Control Module 1/SIB – Shifter Interface Board |
| F10 | Headliner/Auxiliary Switch |
| F11 | Display and HVAC |
| F12 | Steering Column Lock |
| F13 | Video Driving Monitoring System (DMS)/Safety 2 |
| F14 | RC MISC 3/ECM – Ride Control Miscellaneous 3/ Electronic Control Module |
| F15 | Rear Wiper |
| F16 | Cargo APO – Cargo Auxiliary Power Outlet |
| F17 | Sensing Diagnostic Module (SDM)/Safety 1 |
| F18 | RC MISC 1/MISC 2 –Ride Control Miscellaneous 1/ Miscellaneous 2 |
| F19 | Exterior Lighting Module (ELM) TR6 |
| F20 | Central Gateway Module(CGM)/ Telematics (OnStar) |
| F21 | – |
| F22 | European Trailer |
| F23 | Auxiliary Power Outlet (APO) Cigar |
| F24 | Wireless Charger |
| F25 | USB |
| F26 | ELM 6 – Exterior Lighting Module 6 |
| F27 | VCU AUX JACK – Vehicle Communication Unit Auxiliary Jack |
| F28 | ELM 7– Exterior Lighting Module 7 |
| F29 | – |
| F30 | – |
| F31 | BCM 3 – Body Control Module 3 |
| F32 | HSWM – Heated Steering Wheel Module |
| F33 | – |
| F34 | STEERING CLMN ADJ MDL – Steering Column Adjacent Module |
| F35 | Amplifier |
| F36 | DC/DC BATT 2 |
| F37 | – |
| F38 | – |
| F39 | BCM 4 – Body Control Module 4 |
| F40 | – |
| CB01 | Auxiliary Power Outlet (APO) Row 2 |
| CB02 | Auxiliary Power Outlet (APO) Row 1 |
Listings are copied as text from the manual's fuse tables (AI-assisted; every circuit name was matched against the cited pages 2026-10-18). Fuse layouts can differ by trim and year; check the label on the fuse box cover before replacing a fuse, and always use the same amp rating.
Confirm with your own manual, dipstick or door-jamb label.
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