Mine stopped working too....My intermittent speed doesn't work either. I recently had my windshield replaced so I made sure the sensor that is located inside the casing of the rear view mirror was in good shape. So its not the connection. I believe its the sensor itself. I haven't tried to unplug it to see if I can control the speed of the wipers yet but I will.

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Coolbimmerguy
(OO (lll)(lll) OO)