I think Muddydogs is confused as the Damon Intruder is a Class A. There is a problem with a fuse or two and should be pretty easy to determine what is wrong.
Here are two hints for helping you understand and isolate problems with your rig. First read The Twelve Volt Side of Life and second buy and learn how to use a DMM or Digital MultiMeter. Harbor Freight has a 7 function for about $5.00 when on sale and if they are close, subscribe to their ads and you will eventually find a coupon for the meter free of charge.
Finding the fuse/circuit breaker panel(s) may be harder than diagnosing the problem. Typical places to look, cabinets at floor level, cabinets at eyelevel, under the bed, down at floor level under a toe kick. The dealer who sold the unit should know or if purchased from a PP try them.
If you can't find it after look all over, try the Damon Owners club on Yahoo or do a search for an owners club.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II