Ford Starting /House Charging Question UPDATE Test

This covers what everybody has been trying to explain. What I don't know about my rig (yet) is whether the isolator is energized in the key's (pre-starting) ignition position. or just after it starts.

https://expeditionportal.com/forum/threads/whats-the-big-difference-in-a-battery-isolator-versus-starter-solenoid.76484/

That says (scroll down) you can rig it either way to energize it.