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1989 Fleetwood Brougham d'Elegance|2018 Chevy Colorado Z71
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That little circuit board manages timing and operation of the motor for the Wash, Mist, Delay, Low, Medium, and High speeds. Mine stopped working right a year or so ago but I got lucky with one at a junkyard. I took like 5 or 6 home and the first one that worked properly I left in the car. My wipers used to not work on the Wash, Mist, or Delay settings. They would creep up from their hide away place for a second then go right back down. They worked on the full motion settings but wouldn't turn off unless the car was shut down completely. So that little circuit board can cause a variety of little problems. My wipers did some funny shit that me and my friend laughed about when we tried some of the bad boards we took home......
 
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