puzzled by fuse at battery connection

[Tin Tortuga]

Hi folks.
I am puzzled by the 50 amp fuse at the battery leads inside where it connects to univolt. (Which doesn't seem to work)

Wish this was a better drawing . Make sense to anyone ??
(ignore drawing , it changed when i posted)


RED-_______________________ _____________
\

fuse > univolt

Black_______________________/_____________

[john hd]

yes, the negative connection is fused, this is to allow the interior of the trailer to clear a short circuit AND still allow the the trailer break away to work. it may also give some limited protection in case the battery is installed backwards.

the break away circuit is not fused as it should be.

john

[Jim & Susan]

Does it look something like this, minus (a lot of) the jerry-rigging present in mine? As to it not working, I assume you mean the Univolt itself. You can, of course, measure the DC output itself directly. From what I have read on the Forum, they all “Hum” when turned on and functioning normally. The one in my ’73 Overlander is very, very loud. I intend to replace mine with something more modern as part of the overall rebuild of the trailer. This partly due to its advanced age, the noise it makes, the weight and it appears to putting out only about 11 volts (I haven’t had a chance to check it with a digital meter, yet, only an old style analog meter).

Be very careful around this thing, as they say.