[Stripit]

Sorry don't know why the 12 volt system is down, if it was the 110 volt My first stop to look would be every ground fault plug in the trailer. On my unit the GFI located out in the water valve box will kill every wall plug in our kitchen. Here in my house the outside wall plug GFI will kill all electrical plugs in my garage and laundry. If they are all reset and it problem still exists I then would start back checking from the fuse box out with a probe to see if I could find a loose wire connection. What items do you have powered by 12 volt along that area?