Is this true or not?

IDK guys The ECU system works just like points. Power goes to the Coil from the run circuit thru the ballast; but the other side is open circuit until the ECU closes it and without a signal from the trigger, the circuit stays open. Right?
but yeah IDK about the alternator. My guess would be that as the battery falls below a fixed threshold, the Regulator will close the field coil, and a modest current will flow. Without the cooling fan turning, she is likely to get warm.
I think it's a moot point tho, just use the ACC position and done.