Inspection And Verification
WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT
acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.
NOTE:
- Prior to carrying out fault diagnosis of the trailer lamp system, verify the operation of the towing vehicle lighting system with the trailer lighting plug(s) disconnected from the vehicle socket(s).
- Intermittent fault reports may be due to the cycling operation of the Field Effect Transistors (FETs).
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrityVISUAL INSPECTION
MECHANICAL ELECTRICAL - Trailer lamp(s) condition and installation
- Bulbs and installation
- Bulb holders and installation
- Trailer socket(s), plug(s) and installation
- Fuses
- Relays
- Stop lamp switch
- Wiring harness
- Loose or corroded connector(s)
- Trailer socket(s) ground circuit(s)
- Battery junction box
- Central junction box
- Trailer fuse box
- Trailer relay box
- Instrument cluster
- CAN circuits
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index