We did a little driveway camping this weekend. Friday night watched a little TV, everything worked fine. It was a bit chilly so I plugged in a spaceheater and no problems. We've used this heater on numerous occasions and never had any problems. Some time during the night the heater stopped running as well as all of the receptacles that aren't on a GFI. My first though was a tripped breaker, nope, next I check my inverter since the power runs through it to the inside panel, nope both outputs were fine. I tracked it down to an open neutral in that circuit. After disassembling the motorhome and looking for every junction box I could not find any wiring probems. However FR had to bury one somewhere in the floor that is not accessible. I found two junction boxes under the bed, one under the large slideout, one inside the dinette bench above the one under the slideout. Thank God for my friend John Lamb. He came up to give me a hand trying to trace this issue out. We turned off the breaker and used an extension cord and radio to test each junction box and receptacle. We found if connected to the wires in the junction box under the slideout everything on the driver's side worked but the passenger side was still dead. When connected to the wires in the junction box under bed everything worked so the main feed's neutral had to be broke in that mysterious junction box. We ran a new wire from the panel to the junction box under the bed and disconnected the old wire and wire nutted it off behind the panel. Everything is back to normal but what a nightmare that took from 9:00 AM until 6:30 PM to fix. Most of the time was looking for the junction boxes. This is definitely one of those issues that you wished FR had a wiring diagram. Tracing wires through this RV is really not a simple process. I'm just glad it happened over the weekend and not this week while I'm staying at the York Fairgrounds for the TCA Train Meet. Thank God there are people in this world like John who gave up his Saturday to help me.