Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 889 (LIGHTING SYSTEMS)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 889 (Lighting Systems)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 889 (Lighting Systems)
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic & Routing Diagrams
- Component Locator
- Diagnostic Information & Procedures
- Diagnostic Starting Point - Lighting Systems
- Diagnostic System Check - Lighting Systems
- Scan Tool Output Control
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code List
- DTC B1354: Open In Controlled Ground Circuit Of Courtesy Lamps
- DTC B1397: Short To Ground Or An Open In The Dimming Reference Voltage Circuit
- DTC B1398: Short To Battery Positive Voltage In The Dimming Reference Voltage Circuit
- DTC B1482: Low Instrument Panel Lamps Supply Voltage Circuit Or Courtesy Lamp Supply Voltage Circuit
- DTC B2532: Short To Ground Or An Open In Control Circuit Of The Fog Lamp Relay
- DTC B2533: Short To Battery Positive Voltage In Control Circuit Of Fog Lamps Relay
- DTC B2577: Short To Ground Or Open In Control Circuit Of Headlamp Relay Coil, Or Low Beam Headlamp Control Circuit Relay
- DTC B2578: Short To Voltage In Headlamp Relay Control Circui,T Or Low Beam Headlamp Relay Control Circuit
- DTC B2587: Short To Ground Or An Open In Control Circuit Of Park Lamp Relay Coil
- DTC B2588: Short To Battery Positive Voltage In The Control Circuit Of The Park Lamp Relay
- DTC B2602: Short To Ground Or An Open In The Control Circuit Of The DRL Relay Coil
- DTC B2603: Short To Battery Positive Voltage In The Control Circuit Of The DRL Relay Coil
- DTC B2613: IP Dimmer Switch Circuit
- DTC B2617: Short To Ground In The Courtesy Lamps Supply Voltage Circuit
- DTC B2618: Short To Voltage In The Courtesy Lamps Supply Voltage Circuit
- DTC B2627: Instrument Panel Lamps Supply Voltage Circuit Or Courtesy Lamp Supply Voltage Circuit Low
- DTC B2628: Short To Voltage In The Instrument Panel Lamps Supply Voltage Circuit
- DTC B2645: Short To Battery Positive Voltage In The Ambient Light Sensor Reference Voltage Circuit
- DTC B2647: DRL Ambient Light Sensor Circuit
- DTC B2648: Short To Battery Positive Voltage, Or Open DRL Ambient Light Sensor Low Reference Circuit
- DTC B2665: Short To Ground In The Headlamps Signal Circuit
- DTC B2742: Short To Ground In The Signal Circuit Of The Fog Lamp Switch
- DTC B3840: Open Or A Short To Ground In The Park Lamp Supply Voltage Circuit
- DTC B3841: Short To Voltage In The Park Lamp Supply Voltage Circuit
- DTC B3857: Short To Voltage, Short To Ground Or An Open In The High Beam Headlamp Signal Circuit
- Symptoms - Lighting Systems
- Symptom List
- Notes
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Daytime Running Lamps (DRL) Inoperative
- Fog Lamps Always On
- Fog Lamps Inoperative
- Hazard Lamps Always On
- Hazard Lamps Inoperative
- Headlamps Always On - Low or High Beams
- Headlamps Inoperative - High Beams
- Headlamps Inoperative - Low Beams
- Headlamps Inoperative - Low & High Beams
- High Beam Indicator Inoperative
- Illuminated Entry Lamps Inoperative
- Interior Backlighting Inoperative
- Interior Lamps Off Switch Inoperative
- Lighting Systems
- Park Lamps Inoperative
- Park Lamps Out Indicator Inoperative
- Park Lamps Inoperative - Output at Trailer/Uplifter Connector
- Reading Lamp(s) Inoperative
- Stop Lamps Always On
- Stop Lamps Inoperative
- Turn Signal Lamps and/or Indicator Inoperative
- Turn Signal Lamps Inoperative - Output At Trailer/Upfitter Connector
- Repair Instructions
- Stop Lamp Switch Adjustment
- Stop Lamp Switch Replacement
- Headlamp Switch Replacement
- Fog Lamp Switch Replacement - Front
- Daytime Running Lamps (DRL) Ambient Light Sensor Replacement
- Hazard & Turn Signal Flasher Replacement
- Console Lamp Replacement
- Courtesy Lamp Replacement - Instrument Panel - Left
- Courtesy Lamp Replacement - Instrument Panel - Right
- Instrument Panel (I/P) Compartment Lamp Switch Replacement
- Vanity Mirror Lamp Bulb Replacement
- Headlamp Assembly or Headlamp Bulb Replacement (Aztek)
- Headlamp Assembly or Headlamp Bulb Replacement (Rendezvous)
- Headlamp Aiming (Aztek)
- Headlamp Aiming (Rendezvous)
- Fog Lamp Replacement - Front (Aztek)
- Fog Lamp Replacement - Front (Rendezvous)
- Fog Lamp Aiming Procedure
- Park/Turn Signal Lamp Replacement (Aztek)
- Park/Turn Signal Lamp Replacement (Rendezvous)
- High Mounted Stop Lamp Replacement (Aztek)
- High Mounted Stop Lamp Replacement (Rendezvous)
- Cargo Lamp Replacement
- Backup Lamp Replacement
- License Lamp Replacement (Aztek)
- License Lamp Replacement (Rendezvous)
- Tail Lamp Assembly And/Or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement (Aztek)
- Tail Lamp Assembly And/Or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement (Rendezvous)
- Roof Side Rail Lamp Replacement
- Description & Operation
- Exterior Lighting Systems Description and Operation
- Interior Lighting Systems Description and Operation
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.