'94 s10 blazer wiper problems on 1994 Chevrolet S10 Blazer

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Like many others my wipers have a mind of there own. I turn them on and in the intermittent settiings they will go about a half cycle and stop and in the low or high speed settings they won't stop right away when they are turned off. When they shut off they are usually in the middle of the windshield. I replaced just the motor and it fixed the problem for about 15 minutes, so I replaced the circuit board and about 15 minutes later it was back to square 1 yet again. Is there something that I am missing?
(1) Answer
If they shut off in the middle of the windshield, that is a park problem, the fact that it is so intermittent, I would check the wiper motor module. It also contains a park switch, I think that this is the root cause of your gremlins.

go here and check it out-