While re-wiring as part of our conversion of the Euro I found both the house and chassis batteries tied to the positive starter post and the alternator, but it did have a converter in a closet next to the fridge. No sign of an isolator. Discovered the #2 positive 12v feed to the generator was run through a crossmember and in the back of the generator slide out cabinet. The generator was tied to all the batteries, all the time. There might have been a through wall fitting but it had rusted away many years ago and the insulation was cut to the core. Explains why generator was intermittently starting. Barth used the screw type pot metal fittings with the small screws on the external side inboard of the cabinet. You cannot see the problem until you crawl under and see the back side half shaped clamp is gone. Did anyone else discover that these small units did not have isolators? I guess it might have been deleted in a former life.

Tom, I would say that someone removed an isolator. By 1981 everyone was using isolators. Nothing wrong with removing it other than running chassis battery down with house load.

Nose has an isolator, located in the front just above the chassis battery. It went bad and had to be replaced.