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Old 05-09-2019, 04:25 PM   #1
72timemachine
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Wipers have a mind of their own.

I'm sure I am not alone with this problem. When turning on the wipers on my 1990 GMC 2500 single cab, they do not always work in the speed I select and when I go to turn them off, I sometimes have to turn off the ignition to get them to stop.

On top of this mess, the windshield washer motor does not work atop the lever when you push it forward. I jumped out the motor to the battery and the motor does work so I am thinking the wiper control lever assembly is either haunted or shot. Any thoughts?

Thank you for any help.
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Old 05-09-2019, 06:38 PM   #2
Tom
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Re: Wipers have a mind of their own.

Wiper circut board under the hood.
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Old 05-09-2019, 08:24 PM   #3
Redneck Rydes
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Re: Wipers have a mind of their own.

Had the same problem with my 1994,go get a new circuit board, bolts onto the wiper motor,easy to do.
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Old 05-09-2019, 08:38 PM   #4
Kim57
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Re: Wipers have a mind of their own.

You can remove it and look for some bad solder joints.
I did that with mine and just touched them with a hot iron and it has worked fine since.
Been a couple of years now.
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Old 05-09-2019, 09:31 PM   #5
95 S_Trucker
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Re: Wipers have a mind of their own.

88-90 had a different wiper motor/circuit board. The circuit board is no longer available for the 88-90 trucks, but the 91+wiper motor is a direct swap. It will plug right in.
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