Lighting Systems
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Lighting Systems
- Diagnostic System Check - Lighting Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (PTC) List
- DTC B0951: Headlamp ON Indicator Control Circuit Open, Shorted To Ground, Or Shorted To Voltage
- DTC B1480: Inadvertent Power Supply Voltage Circuit Is Shorted To Ground
- DTC B2527: Front Fog Lamp Switch Signal Circuit Is Shorted To Ground
- DTC B2530: Front Fog Lamp Relay Control Circuit
- DTC B2540: Rear Fog Lamp Relay Control Circuit
- DTC B2550: Backup Lamp Supply Voltage Circuit
- DTC B2575: Headlamp Low Beam Relay Control Circuit
- DTC B2580: High Beam Headlamp Relay Control Circuit
- DTC B2585: Park Lamp Relay Control Circuit
- DTC B2600: DRL Relay Control Circuit
- DTC B2610: Instrument Panel Lamps Dimming Control Circuit
- DTC B2615: Courtesy Lamp Supply Voltage Circuit
- DTC B2620: I/P Dimmer Switch Circuit
- DTC B2625: Instrument Panel Lamps Dimming Control Circuit
- DTC B2645: Ambient Light Sensor Signal Voltage
- DTC B3801: Instrument Panel Dimmer Switch Signal
- DTC B3802: Headlamp Switch
- Symptoms - Lighting Systems
- Backup Lamps Always On
- Backup Lamps Inoperative
- Cargo Lamp Always On
- Cargo Lamp Inoperative
- Clearance Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Daytime Running Lamps (DRL) Always On
- Daytime Running Lamps (DRL) Inoperative
- Exterior Courtesy Lamp(s) Always On
- Exterior Courtesy Lamp(s) Inoperative
- Fog Lamp Indicator Inoperative
- Fog Lamp Indicator Inoperative - Rear
- Fog Lamps Always On
- Fog Lamps Inoperative
- Fog Lamps Always On - Rear
- Fog Lamps Inoperative - Rear
- 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 - High Beams
- Headlamps Inoperative - Low Beams (Except Escalade)
- Headlamps Inoperative - Low Beams (Escalade)
- Headlamps Inoperative - Low and High Beams
- Headlamps Inoperative - Flash to Pass
- Headlight Leveling Inoperative
- High Beam Indicator Always On
- High Beam Indicator Inoperative
- Interior Backlighting Does Not Dim
- Interior Backlighting Inoperative
- Instrument Panel (I/P) Compartment Lamp Inoperative
- Instrument Panel (I/P) Compartment Lamp Always On
- Park, License, and Tail Lamps Always On
- Park, License, and Tail Lamps Inoperative
- Reading 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
- Vanity Mirror Lamp(s) Inoperative
- Repair Instructions
- Stop Lamp Switch Replacement
- Headlamp Switch Replacement
- Headlamp Leveling Switch Replacement
- Lamp Switch Assembly Replacement - Front Fog Lamp and Cargo Lamp
- Fog Lamp Switch Replacement - Rear
- Ambient Light Sensor Replacement
- Courtesy Lamp Replacement - Exterior
- Courtesy Lamp/Reflector Replacement - Door
- Instrument Panel (I/P) Compartment Lamp Switch Replacement
- Dome Lamp Replacement
- Underhood Lamp Replacement
- HID Headlamp Starter/Arc Tube Replacement
- Headlamp Assembly or Headlamp Bulb Replacement (Except Avalanche)
- Headlamp Assembly or Headlamp Bulb Replacement (Avalanche)
- Headlamp Assembly or Headlamp Bulb Replacement (Cadillac)
- Headlamp Assembly or Headlamp Bulb Replacement (HID)
- Headlamp Aiming (Cadillac)
- Headlamp Aiming (Except Cadillac)
- Headlamp Aiming Procedure
- Fog Lamp Replacement - Front (Except Z71)
- Fog Lamp Replacement - Front (Z-71)
- Fog Lamp Bulb Replacement - Front (Old Style)
- Fog Lamp Replacement - Rear
- Fog Lamp Bulb Replacement - Rear
- Daytime Running and Fog Lamp Assembly Replacement (Avalanche)
- Fog Lamp Aiming Procedure
- Marker Lamp Replacement - Front Side
- Marker Lamp Replacement - Rear Side
- Park/Turn Signal Lamp Replacement (Except Avalanche)
- Park/Turn Signal Lamp Replacement (Avalanche)
- High Mounted Stop Lamp Replacement (Utility)
- High Mounted Stop Lamp Replacement (Cadillac)
- High Mounted Stop Lamp Replacement (Escalade EXT)
- High Mounted Stop Lamp Replacement (Avalanche)
- License Lamp Replacement (W/Step Bumper)
- Tail/Turn Signal Lamp Replacement
- Description and Operation
- Exterior Lighting Systems Description and Operation
- Exterior Lamps
- Notes
- Headlamps
- High Beams
- Low Beams (Except Escalade with High Intensity Discharge (HID))
- Low Beams (Escalade w/HID)
- Low Voltage Operation of HID Headlamps
- Electrical System Requirements with HID
- Run Up Of The HID Lamp
- When To Change The HID Bulb
- Light Color (w/HID)
- Daytime Running Lamps (DRL)
- Fog Lamps
- Park, Tail and Marker Lamps
- Exterior Courtesy Lamps
- Turn Signal/Hazard Lamps
- Stop Lamps
- Backup Lamps
- Clearance Lamps
- Exterior Lamps
- Interior Lighting Systems Description and Operation
- Exterior Lighting Systems Description and Operation
- Special Tools and Equipment