TSB : Trailer Lamps

Details

The BECM is programmed to accommodate additional lighting loads when a trailer is being towed. The trailer lamps have the same functionality as described previously for rear fog lamps, reversing lamps, parking/side lamps, direction indicators and hazard warning lamps. If the trailer lamps are of too high a Wattage, the BECM may interpret the loads as a short circuit to ground and deactivate the power outputs to the trailer and vehicle lighting circuits.