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.
BCM Outputs
- Backup Lamps
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the backup lamps are turned ON.
- Brake Applied Outputs
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the brake pedal is applied.
- Instrumentation Backlight
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the I/P lamps are commanded ON by the BCM.
- Interior Lamp Output
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the interior lamps are turned ON.
- LF Turn/DRL Lamp Status
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the left turn signal is turned ON or when the BCM turns ON the DRL lamps.
- LR Stop/Turn Signal Lamp
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the left turn signal is turned ON or when the brakes are applied.
- Low Beam Relay Command
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the low beam headlamps are turned ON.
- Park Lamp Relay
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the park lamps are turned ON.
- RF Turn/DRL lamp Status
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the right turn signal is turned ON or when the BCM turns ON the DRL lamps.
- RR Stop/Turn Signal Lamp
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The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the right turn signal is turned ON or when the brakes are applied.
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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.