A Symptoms - Lighting Systems

IMPORTANT:
1. Perform the Diagnostic System Check - Lighting and Horns 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 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 and Horns. 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 Diagrams.

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)
^ Console Compartment Lamp Always On
^ Console Compartment Lamp Inoperative
^ 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
^ 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
^ Reading Lamp(s) Always On
^ Reading Lamp(s) Inoperative
^ Rear Compartment Lamp(s) Always On
^ Rear Compartment Lamp(s) Inoperative
^ Rearview Mirror Lamp(s) Inoperative - Inside
^ Stoplamps Always On
^ Stoplamps 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