A Symptoms - Lighting Systems

IMPORTANT: The following steps must be completed before using the symptom table.
^ Perform the Diagnostic System Check - Lighting Systems before using the Symptom Tables in order to verify that all of the following are true: Diagnostic System Check - Lighting Systems
- There are no DTCs set.
- The control module(s) can communicate via the serial data link.
^ Review the system description and operation in order to familiarize yourself with the system functions. Refer to Interior Lighting Systems Description and Operation and Exterior 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 in Diagnostic Aids.
^ 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
^ Cornering Lamps Always On
^ Cornering Lamps Inoperative
^ Courtesy Lamps Always On
^ Courtesy Lamps Inoperative
^ Daytime Running Lamps (DRL) Always On
^ Daytime Running Lamps (DRL) Inoperative
^ Hazard Lamps Always On
^ Hazard Lamps Inoperative
^ Headlamp Switch On Indicator Always On
^ Headlamp Switch On Indicator Inoperative
^ Headlamps Always On - Low or High Beam
^ Headlamps Inoperative - Low Beams
^ Headlamps Inoperative - High Beams
^ Headlamps Inoperative - Flash to Pass
^ High Beam Indicator Always On
^ High Beam Indicator Inoperative
^ Interior Backlighting Does Not Dim
^ Interior Backlighting Inoperative
^ IP Compartment Lamp Inoperative
^ IP Compartment Lamp Always On
^ License Lamps Inoperative
^ Park Lamps Always On
^ Park Lamps Inoperative
^ Reading Lamp(s) Always On
^ Reading Lamp(s) inoperative
^ Rear Compartment Lamp(s) Always On
^ Rear Compartment Lamp(s) Inoperative
^ Stop Lamps Always On
^ Stop Lamps Inoperative
^ Turn Signal Lamps and/or Indicators Always On or Flashing
^ Turn Signal Lamps and/or Indicators Inoperative
^ Twilight Sentinel Delay Inoperative
^ Underhood Lamp Always On
^ Underhood Lamp Inoperative
^ Vanity Mirror Lamp(s) Always On
^ Vanity Mirror Lamp(s) Inoperative