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 all of the following are true:
^ There are no DTCs set.
^ The control module(s) is operating properly.

2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to Exterior Lighting and Horns Description and Operation or Interior Lighting and Horns Description and Operation.

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 (Export) or Backup Lamps Always On (Domestic)
^ Backup Lamps Inoperative (Domestic) or Backup Lamps Inoperative (Export)
^ Courtesy Lamps Always On
^ Courtesy Lamps Inoperative
^ Daytime Running Lamps (DRL) Always On (Domestic) or Daytime Running Lamps (DRL) Always On (Export)
^ Daytime Running Lamps (DRL) Inoperative (Domestic) or Daytime Running Lamps (DRL) Inoperative (Export)
^ Fog Lamp Indicator Always On
^ Fog Lamp Indicator Inoperative
^ Fog Lamps Always On (Front) or Fog Lamps Always On (Rear)
^ Fog Lamps Inoperative (Front) or Fog Lamps Inoperative (Rear)
^ Hazard Lamps Inoperative
^ Headlamps Always On - Low or High Beam (Domestic) or Headlamps Always On Low or High Beam (Export)
^ Headlamps Inoperative - Low Beams (Domestic) or Headlamps Inoperative - Low Beams (Export)
^ Headlamps Inoperative - High Beams (Domestic) or Headlamps Inoperative - High Beams (Export)
^ Headlamps Inoperative - Low and High Beams
^ Headlamps Inoperative - Flash to Pass
^ High Beam Indicator Always On
^ High Beam Indicator Inoperative
^ Illuminated Entry Lamps Inoperative
^ Interior Backlighting Does Not Dim
^ Interior Backlighting Inoperative
^ IP Compartment Lamp Inoperative
^ IP Compartment Lamp Always On
^ Marker Lamps Inoperative
^ Park Lamps Always On
^ Park Lamps Inoperative (Domestic) or Park Lamps Inoperative (Export)
^ Reading Lamp(s) Always On
^ Reading Lamp(s) Inoperative
^ Stoplamps Always On
^ Stoplamps Inoperative
^ Trailer Towing Indicator Always On (Pontiac Export)
^ Trailer Towing Indicator Inoperative (Pontiac Export)
^ Turn Signal Lamps and/or Indicators Always On or Flashing (Export) or Turn Signal Lamps and/or Indicators Always On or Flashing (Domestic)
^ Turn Signal Lamps and/or Indicators Inoperative (Domestic) or Turn Signal Lamps and/or Indicators Inoperative (Export)
^ Vanity Mirror Lamp(s) Inoperative