Symptoms - Lighting Systems

SYMPTOMS

IMPORTANT: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle, before using the Symptom Tables in order to verify that all of the following are true:
- There are no DTCs set.
- The control modules can communicate via the serial data link. Initial Inspection
2. Review the system operation and circuit descriptions that apply to the customer complaint in order to familiarize yourself with the system functions. Refer to the following list:
- Exterior Lighting Systems Description and Operation
- Interior Lighting Systems Description and Operation