If you checked the fuses, did you check ALL of them? Sometimes there are a few different fuse panels. My rig has 5 of them that I've found so far. There should be one in the engine compartment and one under the dash that are the most likely.
2004 Tiffin Allegro 27.5 ft. P32 18,000 lb GVW. 8.1 liter. Workhorse chassis built May 2002. 21,000 miles. 2012 Jeep Liberty Toad. RVi2 brake unit.