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.
Courtesy Light Output Short To Battery
Monitored & Set Condition
- When Monitored: Ignition in RUN and IOD fuse/connector installed.
- Set Condition: The BCM has detected a short to battery on the Courtesy Light Driver circuit for 5 seconds.
Possible Causes:
- Shorted Bulb
- Courtesy Light Driver Circuit Shorted To Voltage
- Body Control Module
- Courtesy Lights Driver Circuit Shorted To Voltage
Testing
- Turn ignition off. Disconnect junction block connector C11. See Figure and Figure . Turn ignition on. If all courtesy lights except overhead console lights illuminate, go to next step. If all courtesy lights do not illuminate and overhead console lights illuminates, leave junction block connector C11 disconnected and go to step Β 3 .
- Turn ignition off. Ensure junction block connector C11 is properly reconnected. Turn ignition on. Turn on all overhead console lights with each individual switch. If any light fails to illuminate using individual switch, replace appropriate light bulb. If all lights illuminate using individual switch, repair short to voltage in courtesy light driver circuit (Yellow wire) between junction block and overhead console.
- Turn ignition off. Remove Body Control Module (BCM) from back of junction block. Remove driver door courtesy light bulb. Turn ignition on. Measure voltage on driver door courtesy light bulb 2-pin socket terminal No. 1, courtesy light driver circuit (Yellow wire). If voltage exists, repair short to voltage in Yellow wire. If voltage does not exist, replace BCM. See BODY CONTROL MODULEΒ under REMOVAL & INSTALLATION.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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