Lighting, Exterior

Before performing any lighting system tests, be sure the battery is fully charged and all battery cable connections are clean and tight.

Visual inspection is an important part of the lighting system testing. Check for wires with frayed or damaged insulation, loose connections and improper harness routing. Any problems found by visual inspection should be corrected before performing tests.

To ensure accurate electrical service, it is important to follow a logical diagnosis procedure.

These charts suggest possible conditions, causes and actions for typical electrical problems. Replace burned out bulbs or fuses before proceeding with diagnosis.