voltage regulator

I would imagine that, since the VR is grounding the field coil through it's case, there would have to be a connection thru there(green to case). I imagine the transistor is switching from Full continuity to Zero continuity in response to what it sees the system needing.

Now the Chrysler engineers could design the circuit to fail in either full fielded condition or full open condition.
But since you almost never hear of a a battery being cooked and the headlights being blown out; but you do hear about lots of "fails to charge" conditions, I'm betting on it's failing in full open condition.
To my way of thinking then, with the VR out of circuit, there should be little to no continuity from the terminal "green" to case ground.This means the ohmeter should read open circuit to very high resistance.
'Course my thinkin' has been wrong on many occasions.That's part of learning.
The big question is; Why do you ask?" Inquiring mind or charging problems?

Merry Christmas!