key on not running draw
I saw no movement on dash ammeter.
No movement at all?
But the battery voltage drops, which means there is current flowing out.
and we know the battery is capable of starting the car.
I think its wiring. Current is flowing out, somehow related to the VR, and not going through the ammeter.
I have no other ideas. Maybe the other guys will.
If you want to go over the wiring, take the schematic above and follow the route from the battery to the alternator on your car.
Mark it up (microsoft paint) based on what you actually see, and/or take photos at each item along the way. Or at least the connections in the engine bay. Maybe we'll see something will explain whats happening.