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.
Windshield Wipers
The windshield wipers operate only when the ignition is on.
The SCCM monitors the wiper/washer switch inputs and sends the wiper/washer switch data to the windshield wiper motor through a LIN. Based on the input, the windshield wiper motor activates the windshield wiper on/off relay (and the high speed wiper relay if for high speed wiper operation) to provide the requested operation.
The windshield wiper motor also receives a second input through a fail-safe circuit from the SCCM. This fail-safe circuit makes sure the windshield wipers function in the event a LIN communication failure occurs between the SCCM and the windshield wiper motor. If a failure occurs on this LIN, the wipers operate at low speed when the wiper/washer switch is in any position other than OFF.
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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.