Fred, thanks so much for bringing this to a close for me!!
I do have some additional information for folks who maybe following this issue. Our couch has only one switch that activates the step slide cover. It is located on the center consol area of the dash, in reach of the front seat passenger. The switch is a 2 position rocker switch with 3 blades on the back, one of the blades on our switch is dead(failed) I ended up switching blades. 2 wire leads are attached to this switch, 1 labeled- 132 stepcover batt, 1 labeled- 142 stepcover sw. If you follow the 142 wire around the dash area to the drivers side wall it changes to- 142 stepcover sol. What happens at least with our coach, is the wire passes into the side wall compartment enter/exit via a 10 or 12 pin plug. In our case the pin responsible for 142 was burn beyond being conductive. I cut both sides of 142 from the multi pin plug. I then spliced a heavy duty blade fuse holder onto wire 142. I started with a 10A blade fuse, I’ve reduced down to a 3A and the step slide cover is functioning fine.
My problem was 2 fold, a bad rocker switch and a bad pin in a multi pin plug. I’m guessing that these two failures are related. Whether the switch began to fail or the pin within the plug preceded it, one most likely had something to do with the other.
I will say, my repair is in no way a recommendation to anyone to do the same. This is provided as information only not a recommendation for repair.