Follow Up
Isolated the hot wires from the slide rocker switch. It still blew the fuse when I towed down to the Salem OR area. This tells me the ground is between the electric panel and the rocker switch. Hooked the wires back up and replaced the fuse (5th time). Slide worked properly while in the rv park. Forgot to pull the fuse when we went on down towards Reedsport.But when parked the slide still worked properly. Had not blown the fuse.Figured that it must have finally arched away enough of the grounding area, so as to not touch any more. This kinda makes sense to me if it is grounding on aluminum. Kinda like fixed itself. Towed on to the Florence area of OR and slide still deployed after towing. But when I retracted the slide it blew the fuse just at the end of the retraction. Hummm? Never done that before. Was wondering if that circuit had a minor grounding episode, but not enough to blow the fuse, just weaken it a bit. But, it had deployed ok, just blew it on the retraction. Came on home with the blown fuse and parked it. Replaced the fuse and it is back to working properly. I don't think it is a good situation, knowing there is the potential for a grounding event, but short of tearing out a bunch of wall/floor what is the alternative? If it stops altogether that is one thing, but if it keeps on occasionally blowing the fuse that is another thing. At this point a dealer probably would not be able to duplicate the problem. While in Salem I went to Highway RV and asked the service rep what she thought,
"Well, a 40 amp fuse seems to make a difference for some owners". Well, the main fuse is a 40 amp one. Guess it could arc longer and bigger with one of those. Not even going to a 40 amper.