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.
Wiper/Washer System IPO: BC1
A ground signal from the BC1 energizes the wiper relays (both for the front and rear wipers).
The BC1 also provides a ground signal for the headlamp washer relay. Washer pump operation (front and rear washers) is controlled by the BC1 through a reversing of polarity to the washer pump.
Inputs to the BC1 include:
- Wiper Switch - Front Wiper Speed Request
Front Washer request
Rear Wiper Request
Rear Washer Request
- Headlamp Switch (For headlamp wash functions)
- Tailgate position Switch (For rear wiper functions)
- K-Bus - Vehicle speed
AIC Status
- Park Contacts - Front Wiper Motor (Park Position and Stall Protection)
Rear Wiper Motor (Park Position and Stall Protection)
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.
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