A Symptoms - Lighting Systems

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

1. Perform Diagnostic System Check - Lighting Systems Diagnostic System Check - Lighting Systems
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to Exterior Lighting Systems Description and Operation and Interior Lighting Systems Description and Operation.

Visual/physical inspection
^ Inspect for aftermarket devices which could affect the operation of the lighting system. Refer to Checking Aftermarket Accessories.
^ 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 Diagnostic Aids.

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
^ Fog Lamp Indicator Inoperative
^ Fog Lamps Always On
^ Fog Lamps Inoperative
^ Hazard Lamps Always On
^ Hazard Lamps Inoperative
^ Headlamps Always On - Low or High Beam
^ Headlamps Inoperative - Low Beams
^ Headlamps Inoperative - High Beams
^ Headlamps Inoperative - Low and High Beams
^ High Beam Indicator Inoperative
^ Interior Backlighting Does Not Dim
^ Interior Backlighting Inoperative
^ Interior and Exterior Lamps Inoperative (SEO)
^ Park Lamps Always On
^ Park Lamps Inoperative
^ Spot Lamp Inoperative (SEO)
^ Stop Lamps Always On
^ Stop Lamps Inoperative
^ Surveillance Mode Switch Inoperative (SEO)
^ Turn Signal Lamps and/or Indicators Always On or Flashing
^ Turn Signal Lamps and/or Indicators Inoperative