A Symptoms - Lighting Systems

IMPORTANT: The following steps must be completed before doing the Symptom tables.

1. Perform the Diagnostic System Check - Lighting Systems Diagnostic System Check - Lighting Systems
^ No DTCs are 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 or 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 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 (Regal) or Backup Lamps Always On (Century)
^ Backup Lamps Inoperative (Regal) or Backup Lamps Inoperative (Century)
^ Cornering Lamps Always On
^ Cornering Lamps Inoperative
^ Courtesy Lamps Always On
^ Courtesy Lamps Inoperative
^ Daytime Running Lamps (DRL) Inoperative
^ Fog Lamp Indicator Inoperative
^ Fog Lamps Always On
^ Fog Lamps Inoperative
^ Hazard Lamps Inoperative
^ Headlamps Always On - Low or High Beam
^ Headlamps Inoperative - Low Beams
^ Headlamps Inoperative - High Beams
^ Headlamps Inoperative - Low and High Beams
^ Headlamps Inoperative - Flash to Pass
^ Headlamps Inoperative in Low Light Conditions
^ 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
^ Park Lamps Always On
^ Park Lamps Inoperative
^ Park Lamps Inoperative in Low Light Conditions
^ Reading Lamp(s) Always On
^ Reading Lamp(s) Inoperative
^ Rear Compartment Lamp(s) Inoperative
^ Rearview Mirror Lamp(s) Inoperative - Inside
^ Stop Lamps Always On
^ Stop Lamps Inoperative
^ Turn Signal Lamps and/or Indicators Always On or Flashing
^ Turn Signal Lamps and/or Indicators Inoperative
^ Vanity Mirror Lamp(s) Always On
^ Vanity Mirror Lamp(s) Inoperative