Slide blows fuze

That makes sense. By the hot wire I suspect you mean the positive terminal of the battery (usually the red wire). There is like a 40 amp fuse between the battery and the other 12v circuits, right? The main 40 amp fuse does not blow, I suppose because the 30 amp one to the slide goes first. The breaker/fuse panel is beneath the refrig at the back door. What do you think the routing is for the wires to the bank of switches on the end of the upper cabinet across from the breaker/fuse panel? Thru the floor and up the outside wall to the upper cabinet or up pass the refrigerator and thru the roof to the upper cabinet with the switches? Seems that most all six of the wires going to the switches from the fuse panel should not have any splices in them and all of them would be hot. So this wire to the slide would have to be shorting out to a ground of some sort. Correct? The most likely area would be at the switches (no ground in the wood cabinet) or behind the fuse panel, OR a pinched wire someplace in between. Might be easier to tow it that 100 miles for waranty work.