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 Relays
The two Wiper Relays work in conjunction with each other to provide power to the wiper motor for Slow or Fast operation.
Both Relays are powered (Relay Term 86) by fuse F09. The On/Off Relay, a 4 pin relay, receives its energizing ground (Term 85) from the BC1. The Fast/Slow Relay, a 6 pin relay, also receives its energizing ground (Term85) from the BC1. While the On/Off relay functions as a standard on/off type relay, the Fast/Slow relay operates as a switch over type relay.
The at rest state of the On/Off relay is off (no power flowing through the points) and the rest state of the Fast/Slow relay is on(power flowing through one of the point sets to the slow connection of the wiper Motor).
The energized state of the On/Off relay provides power to the fast/slow relay, so that while the fast/slow relay is not energized B+ flows to the slow speed connection on the wiper motor. When the Fast/Slow relay is energized by the BC1, the points are switched over to supply B+ to the Fast speed connection on the wiper motor.
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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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