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.
Multifunction Switch
The multifunction switch controls the various components electrically. The multifunction switch is hardwired to the SJB and controls a ground signal for the high beam, flash-to-pass and turn signal functions. The multifunction switch is also hardwired to the wiper module and controls a ground signal for the various wiper and washer functions.
For headlamp and turn signal concerns, refer to DIAGNOSIS AND TESTING . For wiper and washer concerns, refer to WIPERS AND WASHERS .
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.