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.
Assist Step Controller Disable Switch
The disable switch input is normally pulled to B+ through a resistor in the assist step controller. The disable switch sends a ground signal to the assist step controller with a switch closure. The assist steps will move to a retract position once all doors are closed and remain retracted until the disable switch is opened and a door on the same side as the retracted assist step is opened. An assist step that is extended when the disable switch is active will retract when the vehicle speed reaches 5 mph or the vehicle is shifted from the park position to the drive position.
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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.