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The wiper circuit on a 1985 GMC Jimmy operates using a combination of a switch, a relay, and the wiper motor. When the driver activates the wiper switch, it sends power to the wiper motor through a relay, which may also control the speed settings (low, high, and intermittent). The motor then drives the wiper arms back and forth across the windshield. Additionally, there is a park switch in the motor that ensures the wipers return to a resting position when turned off.

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3w ago

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