Call RV Custom Products, they are very helpful. If your 12V distribution panel is made by them ask for the schematic and troubleshooting guide for it. They will email it to you.
RV Custom Products
14000 Anson Ave,*Santa Fe Springs,*CA*90670
Chuck & Teri, 1999 35 ft. Dolphin 5350, F53 Chassis with tag axle, Chassis build date 1/99 in Mexico, Banks System, Trans Command, Air Lift Air Bags on rear, Koni Shocks, Blue OX TruCenter, TigerTrak track bars front and rear, Roadmaster 1-3/4" rear auxiliary sway bar, 2013 VW Passat TDI SEL Premium, 1994 36 ft. Avion 5th Wheel. FMCA #F430129