After looking at the Atwood installation manual, I see that there are only two wires that go to the jack. Obviously this means there are no limit switches in the unit and the controller only monitors motor current and that is how it determines if the jack is fully retracted (or extended). The clicking the jack makes for a few moments is no doubt the clutch that will slip in an overload situation (also with the jack at full extend/retract). This makes me even more convinced that my problem is poor brush contact in my leveler. Still looking for someone who has opened one up. Hate to have to be the first one....