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.
Circuit Description
The BCM provides control for the R DRL relay circuit. The BCM grounds the R DRL relay control circuit in order to energize the R DRL relay and turn ON the RF turn signal. This allows the RF turn signal to be used for DRL, UTD, and approach lighting functions. The BCM monitors the voltage level on the R DRL relay control circuit. When the BCM commands the relay ON, the voltage level on the R DRL relay control circuit should be low. When the relay is OFF, the voltage on the R DRL relay control circuit should be high. If the BCM detects a voltage level other than expected, a malfunction is present and a DTC will set.
NO RELATED
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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.