Unplug the headlamp switch and if light goes off, the switch is faulty.
Check the park lamp relay in underhood fuse box for sticking. Unplug the relay and put it aside. Unplug the starter relay and plug it into the socket and note if the relay clicks and lights comes on. If no, the relay is faulty.
If light comes on, either the Body Control Module is faulty or you have a short to ground for the wire between the BCM and headlight switch or between BCM and relay.
Sunday, December 12th, 2010 AT 5:54 AM