No, that too, but I meant the loads on the engine battery that are on in "ON", but get cut off when you go to "START" so they are not on at the same time the starter is on.
So here is how it works:
DUAL
1) Flip rocker to DUAL position.
2) Set ignition key to RUN position (engine is generally running at this point).
Engine electrical system now energizes charge solenoid and house and engine batteries are ganged together.
MOM
1) Hold rocker to MOM position.
House batteries energizes charge solenoid. House and Chassis batteries are ganged together.
2) Turn Key to START.
All non-essential loads are turned off in START mode.
Engine starts.
3) Release key. It returns to RUN mode.
All normal chassis electrical functions resume.
4) Release MOM rocker.
Charge solenoid is disengaged.
