I just took my selector apart a few days ago and learned something
In the Secours position only the service battery bank will start the
engine. The engine battery does not have a contact in that position.
I assume AMEL did this, so the service battery will not be damaged
if there is a short circuit in the engine battery bank.
It is pretty easy to disassemble the selector. You can take away
layer after layer and verifiy, how the positions are switched.
--- In email@example.com, "Alex Paquin"
both battery banks at the same time? Is it safe to run the enginein
this position any period of time?