Diagnostic Starting Point - Lighting Systems

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Begin the system diagnosis with DIAGNOSTIC SYSTEM CHECK - LIGHTING SYSTEMS . The Diagnostic System Check will provide the following information:

The identification of the control module(s) which command the system
The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.