Also note: Although you are dealing with "Residential" 120 volt circuits and "Automotive" 12 volt circuits, few residential electricians or auto mechanics are familiar with how these systems interact in RV applications. If you feel the need for expert help, a mobile RV service technician would be your best bet.
This is a great resource:
http://rvservicereviews.com/
Internet search and RV dealerships are another source.
__________________
2008 Itasca 37H
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months
Yellowstone Lake 6-1-2012