Jim Dunmyer wrote:

> Charlie/Betty Burke wrote:
> > The charge line is a continuous circuit from charge line in tow vehicle to
> > battery in trailer. So yes the blue wire is hot when you are on shore power.
>
> Charlie,
>
> Maybe, maybe not. Although it NOW is in my Airstream, it wasn't that way when
> it came from the factory. It used to have a low-voltage cutoff relay that would
> disconnect the trailer from the vehicle charge line to prevent draining the
> vehicle battery. To get the relay closed again required starting the vehicle and
> getting the voltage over 13.5 or so.
>
> I have no idea how many Airstreams used that outfit or if they maybe still do,
> but trailers that have it would have to have a bypass switch or something
> installed.

That's one of the wonders of Airstream's. Just when you think you got something figured out, someone comes along with something different. Can't say as I'd heard of that disconnect relay.

Charlie