Need more information. Is the control panel lighting up when you power it on? If so, what happens when you push the buttons.
Is your slide still operable or has that stopped working as well.
There are about 8 fuses for the entire system, 4 on the box itself above your left foot when sitting in the driver's seat. You have 2 more (working from memory here) on the wiring next to the pump in front of the radiator. The system also has a fuse on the fuseblock when you rotate the dash panel upwards, but it controls other things as well....the outside temperature guage is the item that won't be illuminated if the fuse is bad.
Let me know some more information as I got to know this very well last summer. I'm speaking of the HWH leveling system btw.
Tom