Originally Posted by mkguitar
it wouldn't be a short circuit in the conventional sense.
It would be a load- but this discussion is based on getting somewhere..or being stuck.
and saves physically moving the coach battery, making use of the woring that exists
and the jumper is 4AWG or 4ø
I have an attachment point on the battery side of the in line breaker, and
about 2 feet distance to jump
The jumper size is much less critical than the van wiring to the chassis battery, as it may be too small for carrying starting loads, or have too big of a voltage drop. It may also have breakers in the line that would be 50 or 80 amps typically, so they would trip. It is usually better to use your generator to do the charging with separator jumped, if you have one.
Bottom line is that it might work, but might not, depending on the hardware.