If your pumps not working then defective monoplex controler maybe the culprit. In my rig I ended up hooking up 12 volts directly to pump to determine it was working fine and replaced the controller.
Fleetwood generally puts the pump fuse very close to the pump, in the +12v line, as the ground side is used for the switching (via the Monoplex Controller)
There could be two. One should be in the DC power distribution panel. It is normally located behind small metal plate adjacent to the 120 volt circuit breakers. It could be in the battery control center. Another fuse sometimes is located next to the water pump itself.