A Preliminary Information

IMPORTANT: The following steps must be completed before using the symptom tables.
1. Perform A Diagnostic System Check Lighting Systems before using the Symptom Tables in order to verify that all of the following are true:
- There are no DTCs set.
- The control module(s) is operating properly.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to Lighting System Description.

Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the Lighting System. Refer to Checking Aftermarket Accessories in Diagrams.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Backup Lamps Always On (Domestic)
- Backup Lamps Always On (Export)
- Backup Lamps Inoperative (Domestic)
- Backup Lamps Inoperative (Export)
- Battery Rundown Protection Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Courtesy Lamps Inoperative with IP Dimmer Switch
- Courtesy Lamps Inoperative with Doors Open
- Courtesy/Reading Lamps Always On
- Courtesy/Reading Lamps Inoperative
- Daytime Running Lamps (DRL) Headlamps Inoperative (Domestic)
- Daytime Running Lamps (DRL) Headlamps Inoperative (Export)
- Fog Lamps Always On
- Fog Lamps Always On - Rear
- Fog Lamps Inoperative - Front
- Fog Lamps Inoperative - Rear
- Fog Lamp Indicator Inoperative - Front
- Fog Lamp Indicator Inoperative - Rear
- Fog Lamp Indicator Always On - Front (Domestic)
- Fog Lamp Indicator Always On - Rear (Pontiac Export)
- Hazard Lamps Inoperative
- Headlamps Always On - Low or High Beam (Domestic)
- Headlamps Always On - Low or High Beam (Export)
- Headlamps Inoperative - Low Beams (Domestic)
- Headlamps Inoperative - Low Beams (Export)
- Headlamps Inoperative - High Beams (Domestic)
- Headlamps Inoperative - High Beams (Export)
- Headlamps Inoperative - Flash to Pass
- Headlamps Inoperative - One Lamp (Domestic)
- Headlamps Inoperative - One Lamp (Export)
- Headlamps Inoperative - Low and High Beams
- Headlamps Inoperative - Low and High Beams
- High Beam Indicator Always On
- High Beam Indicator Inoperative
- IP Compartment Lamp Inoperative
- IP Compartment Lamp Always On
- Vanity Mirror Lamp(s) Inoperative
- Instrument Panel Lamps Do Not Dim
- Instrument Panel Lamps Inoperative - One
- IP Lamps Erratic with Dimmer Switch
- IP Lamps or VF Displays Inoperative
- Park Lamps Always On
- Park Lamps Inoperative
- Personalization Mode Inoperative
- Roof Rail Courtesy/Reading Lamp Always On
- Roof Rail Courtesy/Reading Lamp Inoperative
- Stop Lamps Inoperative
- Stop Lamps Always On
- Trailer Towing Indicator Always On (Pontiac Export)
- Trailer Towing Indicator Inoperative (Pontiac Export)
- Turn Signal Lamps Inoperative
- Turn Lamps Always On
- Turn Signal Indicator Always On - Left
- Turn Signal Indicator Always On - Right
- Turn Signal Indicators Inoperative - Left
- Turn Signal Indicators Inoperative - Right
- VF Displays Do Not Change Intensity - All
- VF Display Do Not Dim w/Park Lamps On