I just recently acquired a 1971 Airstream Tradewind that the inside was gutted down to the walls and completely redone. They did not take the interior walls down and did not replace or mess with original wiring (that I know of). The only thing different done was addition of some LED lights over the counter tops. When the trailer is sitting at my house I had it plugged into 110v outlet for the converter to charge the battery. This worked the first few days after bringing it home (I think, it could have been that the battery was just fully charged when I picked it up). A week has gone by and the outlet the converter is plugged into is no longer working. After some probing around with a volt meter we discovered there is an open neutral in that outlet. All other outlets in the trailer are registering correct. When testing the wires (pulled the outlet off the wires to make sure it wasn't a bad outlet) the ground to the hot, showing around 112 volts. Ground to neutral 0 volts. and then Hot to neutral 0 volts. Checked the connection at the breaker box inside the trailer, all seem to be connected good and correctly. When plugging the extension cord into the converter directly converter works as it should. Also, when the converter is plugged into the 'open neutral' outlet and the lights that run down the center of the trailer are turned off the new LED lights that were installed come on, and then when the center lights turned back on, the LED lights go off. Not sure if this is related or not. My questions are: Are these two things related, and any advice on finding the open neutral without ripping out the walls? I've been searching for an electrical diagram but haven't found it. Go easy on me and my terminology and knowledge of electrical systems, I'm new to all of this.