Symptoms - Lighting

The following steps must be completed before using a symptom table. Perform the Diagnostic System Check - Vehicle before using a symptom table in order to verify that all of the following conditions are true: – There are no DTCs set. – The control modules can communicate via the serial data link. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following: – Exterior Lighting Systems Description and Operation – Interior Lighting Systems Description and Operation – Trailering Description and Operation Visual/Physical Inspection Inspect for aftermarket devices which could affect the operation of the lighting system. Refer to Checking Aftermarket Accessories. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. Intermittent Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections. Symptom List Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: Backup Lamps Malfunction Cargo Lamps Malfunction Courtesy Lamps Malfunction Daytime Running Lamps Malfunction Dome Lamps Malfunction Hazard Lamps Malfunction Headlamps Malfunction Interior Backlighting Malfunction Park, License, and/or Tail Lamps Malfunction Stop Lamps Malfunction Trailer Lamps Malfunction Turn Signal Lamps and/or Indicators Malfunction