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Question:

97 GMC Sierra windshield wipers quit?

There is juice at the fuse (not blown), I tried to hot wire the motor (Bat to purple wire, Grnd to black) with now results. I figured it was the motor, but the washers quit as well, so maybe the switch. It worked fine then would quit in a heavy rain, then re-start. This time I ran the switch everywhere and finally hit high and they worked a minute (and I shut them off), then nothing worked again. Thank goodness for RainX. How would any of you test the motor and switch to find the culprit? Thanks. Dave

Answer:

you ruled out the power source. Try this disconnect the wipers from the motor to rule out binding in the wiper arms. If wiper arms have free play it sounds to me like you have a overheating motor or the circuit board in the motor for the washers and motor is bad.
on the motor lil black cover 3 torx screws unplug it get a new one its the module very common problem on em (wiper module) be my first guess and generally the problem
I don't know. I drive a 95 and used to tap the windshield wiper motor anytime it'd stop it'd work.

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