OK, I'm with you it has to be a relay or two causing this. Problem is no relays are marked for trailer in the owner's manual. There is a small relay box in the engine compartment that is unmarked, and not referenced in the owner's manual. It must be one or ore of those. If I could find the function of those relays I think this will be simple fix. Any ideas how to obtain that information from Ford or this forum? If not, I coudl just start pulling them. Thanks again.