General Information

Vehicle utilizes lighting on interior and exterior of vehicle for illuminating and indicating purposes. Lighting circuits are protected by fuses. Lighting circuits require an overload protected power source, on/off device, lamps and body ground to operate properly. Plastic lamps require a wire in harness to supply body ground to lamp socket. Replace sockets and bulbs that are corroded.

Some interior and exterior lighting functions are governed by body controller. Headlamp and door ajar switches provide signals to body controller. The body controller activates relay(s) in order to provide either a ground or feed line to appropriate lamp(s). Wire connectors can make intermittent contact or become corroded. Before coupling wire connectors, inspect terminals inside connector. Male terminals should not be bent or disengaged from insulator. Female terminals should not be sprung open or disengaged from insulator. Bent and sprung terminals can be repaired using needle nose pliers and pick tool. Corroded terminals appear chalky or green. Corroded terminals should be replaced to avoid recurrence of problem symptoms.

Begin electrical system failure diagnosis by testing related fuses in fuse block and power distribution center. Ensure bulbs are in good condition and test continuity of circuit to ground.