Looked at a 1981 International for sale and found A/C inoperative as well as all three Fantastic fans. Lights work so I checked breakers. Unit was plugged in and my no contact tester assured me there is power from each breaker.
Checked battery behind propane tanks and found it almost completely dead. Unplugged the Airstream from shore power and went back inside to check
12 volt power at a ceiling light. It was over 12 V!
Went outside and disconnected the battery so there was no power to the trailer at all and the lights inside were still on.
I am not familiar with this model so my question is, where is the 12 V. power coming from? Is there a second battery? Where? Also where might I find the 12 V. fuse panel? Finally, why would I not have power at the A/C so that even the fan would work?