Important:
• No DTCs are set. • The control module(s) can communicate via the serial data link.
• | Inspect for aftermarket devices which may 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 may cause the symptom. |
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: