Howdy everyone..! My first post and a noobie to the RV world Took our 1988 Ford Fleetwood Rallye motorhome our of winter storage for the first time last week and notice that the 12V cabin lights were not working. Then found out that all of the appliances (water pump, tank level monitor lights, stove fan, etc.) were not getting power either. So, hooked-up the generator and tested. The power indicator on the 30A surge protector plug we purchased revealed that we have a ground fault. Inside we confirmed that the cabin lights all work, the stove fan and the AC fan also work, but still no power to the pump, tank monitor display. We tested the 120V receptacles and they all work. There is one (1) GFI wall outlet and it was tested and reset without issues. Checked the cabin battery and has a full charge. Two (2) red cables are connected to the +ve terminal and the sine wave converter red cable is connected to the +ve and black to the -ve (photo attached) Checked the converter coil relay to see if it wasn't switching from 120V (generator) to 12V (cabin battery) by pushing it back and forth, but no dice. Stumped as to what could be the issue or what steps to take next. Any advice or shared similar experiences would be greatly appreciated.