A Symptoms - Lighting Systems

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

1. Perform Diagnostic System Check - Lighting and Horns before using the Symptom Tables in order to verify that there are no DTCs set. Diagnostic System Check - Lighting Systems
2. Review the system description in order to familiarize yourself with the system functions. Refer to Exterior Lighting and Horns Description and Operation and Interior Lighting and Horns Description and Operation.

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the Lighting and Horns. 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
^ Backup Lamps Inoperative
^ Courtesy Lamps Always On
^ Courtesy Lamps Inoperative
^ Daytime Running Lamps (DRL) Inoperative (Scandinavia) or Daytime Running Lamps (DRL) Inoperative (Pontiac, Chevy, Domestic, Gulf States)
^ Fog Lamp Indicator Inoperative (Rear) or Fog Lamp Indicator Inoperative (Front Europe) or Fog Lamp Indicator Inoperative (Pont, Chevy, Domestic, Gulf, Japan)
^ Fog Lamps Always On (Pont, Chevy Domestic, Gulf States, Japan) or Fog Lamps Always On (Rear Europe)
^ Fog Lamps Inoperative (Pont, Chevy Domestic, Gulf States, Japan) or Fog Lamps Inoperative (Rear Europe) or Fog Lamps Inoperative (Front Europe)
^ Hazard Lamps Always On
^ Hazard Lamps Inoperative
^ Headlamp Door(s) Inoperative
^ Headlamps Always On - Low or High Beam (Japan, Europe) or Headlamps Always On - Low or High Beam (Scandinavia) or Headlamps Always On - Low or High Beam (Pontiac) or Headlamps Always On - Low or High Beam (Chevy Domestic, Gulf States)
^ Headlamps Inoperative - Low Beams (Europe, Jap, Chevy Dom, Pont, Gulf States) or Headlamps Inoperative - Low Beams (Scandinavia)
^ Headlamps Inoperative - High Beams
^ Headlamps Inoperative - Low and High Beams (Pontiac) or Headlamps Inoperative - Low and High Beams (Chevy Dom, Gulf States, Eur, Scan, Japan)
^ Headlight Leveling Inoperative
^ High Beam Indicator Always On
^ High Beam Indicator Inoperative
^ Interior Backlighting Does Not Dim
^ Interior Backlighting Inoperative
^ Park Lamps Inoperative
^ Stoplamps Always On
^ Stoplamps Inoperative
^ Turn Signal Lamps and/or Indicators Always On or Flashing
^ Turn Signal Lamps and/or Indicators Inoperative