Dan, here are a couple of possibilities:
Try pulling the cover in front of the passenger seat. Be sure to open the black boxes which contain mini plug-in relays & fuses as well as the visually obvious ones. The panel activates when the ignition switch is "On" or in "Accessory" position to the left. These actions should turn the panel on by activating respective mini relays.
If you don't find any issues behind that cover, pull the HWH panel from the drawer and check the connections. Good Luck!
Bob Bowers (Surprise, AZ)
2003 Alpine Coach 40' FDTS
2014 Jeep Cherokee Lattitude