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 - Integral Motor: Operation
The basic washer pump is a spring loaded piston enclosed in a plastic cylinder housing with an actuator plate extending from the cylinder housing. A valve assembly, consisting of two exhaust and one intake check valve, is attached to the end of the cylinder housing.
A tang on the piston actuator plate holds the plate in a lock-out position, (no pumping action). To start the pump, push washer button which will energize the relay. This pulls the relay armature toward the coil allowing the ratchet gear pawl to engage the ratchet gear and begin rotation. This sequence starts pumping action.
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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.