mack1

Hi Tad,

1986 was a poor year for windshield wiper controls on S10's. The control circuit that triggers the wiper motor is succeptable to electrical noises. We had one and it would sometimes make a wipe while just driving down the road. If you tear one apart, you will see a true piece of junk. It uses a printed circuit board with a wiper contact that rides on the circuit board. (again, true junk) No good solutions, I think I ended up soldering a resistor between the input and ground to help the problem. Ford was careful not to steal that idea form GM.

It might be as simple as changing a capacitor at the altenator to ground (I recall it had one), but no clear solution.

Guess that's no help at all. They probably had a recall repair for it, but it was never advertised.

Regards,
Mack1