Chuck,
The fuse is at the controller. If your coach is wired like mine, the controller is accessible by removing the access panel on the top of the dash above the instrument panel. My controller was behind the coiled up CB antenna cable (I looked a couple of times before I realized it was hidden behind the cable). The controller is a PC board with a cover ~4x4". Wires to it are multicolored ~18awg.
If it's not there, check behind the panels in the magazine rack. I've seen them there also.
Steve