Lighting and Horns: Testing and Inspection

This system shares diagnostic procedures with the Body Control Module. Refer to Body Control Module / Testing and Inspection / Procedures / Trouble Code Diagnostic Charts when testing this system.
Testing and Inspection

When a vehicle experiences problems with the headlamp system, verify the condition of the battery connections, fuses, charging system, headlamp bulbs, wire connectors, relay, high beam dimmer switch and headlamp switch.

Each vehicle is equipped with various lamp assemblies. A good ground is necessary for proper lighting operation. Grounding is provided by the lamp socket when it comes in contact with the metal body, or through a separate ground wire.

When changing lamp bulbs, check the socket for corrosion. If corrosion is present, clean it with a wire brush and coat the inside of the socket lightly with Mopar Multi-Purpose Grease or equivalent.