I think I am having the same problem as you with the a/c controller. When I move the harness the a/c cuts in and out or if I hit a bump or something running down the highway. Does this with both controllers I have. I would really like a new controller unit but I cannot find one anywhere. Most people have no idea what kind of truck it is to begin with. This is starting to get very annoying. I hope you get all yours working correctly b/c you need some a/c in the south. Geez