Inspection and Verification
- Verify the customer concern by operating the vehicle stoplamps, turn signals and rear lamps. If the vehicle exterior lamps do not operate correctly, refer to STOPLAMPS , TURN SIGNAL AND HAZARD LAMPS or PARKING, REAR AND LICENSE LAMPS .
- Visually inspect for obvious signs of mechanical and electrical damage.
- If the vehicle exterior lamps operate correctly, verify the operation of the trailer stoplamps, turn signals and tail lamps.VISUAL INSPECTION CHART
Mechanical Electrical - Trailer Tow Module
- Bulbs
- Trailer Tow Relay
- Circuitry
- Trailer Tow Auxiliary Junction Box (AJB) Fuses:
- 33 (15A)
- 37 (15A)
- If the concern remains after the inspection, proceed to the SYMPTOM CHART to continue diagnostics.