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.
DTC B1802, Courtesy Lights Circuit (Short To Ground): Notes
When BCM receives voltage from INADV POWER BUS fuse, it supplies voltage to all courtesy lights through circuit No. 1732 (Orange wire). DTC B1802 will set when BCM detects a short to ground in circuit No. 1732 (Orange wire) or is shorted to ground internally for more than 0.1 second. No driver warning message will be displayed.
DTC B1802 requires an ignition cycle to change from current to history. If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B1802 will also clear when conditions no longer exist or scan tool is used to clear codes.
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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.