I installed delay wipers from a junkyard truck a year or two ago with no problems. Recently I noticed that sometimes with it set on delay, the wipers will stop in the middle of the windshield. If I move the switch I can get them to work again. With the wipers on regular speed they seem to be ok. Is there something I can do to check this out? I don't want to be stuck with no wipers some day.

 

Clean the ground wire "eye" on the switch. and make sure that the ground connections are clean and tight. This should eliminate this problem.

Let us know what happens.

 

Ground seems good and clean, we'll see...