You should have some of these panels that control the Intellitec lighting system. The fuses shown are for each light. The big red wire is the main 12v power supply, protected by a auto reset circuit breaker.
I have a 40' coach and these modules are in toilet room in a cabinet.
Finding this module would be a good place to start looking for your cause of no lights. Mark or Chris at M & M RV Electronics offer free Intellitec support. 419 965-3014
2008 Monaco Camelot 40' PDQ