Wipers on my 1992 LY motorhome will come on and operate when the weather is damp or its raining, even when the switch is off. Position of the switch makes no difference, the wipers continue to operate for about 15 minutes, plus or minus.
I had a shop check everything out, and they said it appeared my ground may not be good. So he installed an addtional ground wire.
However, the next time it rained the wipers repeated the, on, condition.
Has anyone else had this problem, and if so what is the fix. I would gladly replace the wiper motor if necessary, or the switch if its the problem, but I would rather not start replacing parts.