RV Repair: inside lights wont work, jumper cables, car style

Question
I have a 2007 weekend warrior travel trailer 23 foot superlight when plugged in to outside power source my house 30amp plug my microwave and receptacle plugs work.But my inside lights stopped working with battery and house source.I have taken the switch wires off hooked them together still nothing.I have checked the GFI still nothing.any thing I have over looked greatly appreciated

Answer
Ok This is usually a sign that the converter is bad. To check it check the car style fuses in the 12 volt pannel. if they all are good try hooking up a battery charger or even jumper cables from the truck to the rv bat. If you get the lights to work then we just have to find the converter

check back with  me and I can help this is an easy fix usually