Okay, lots of good suggestions here. I have checked the VR ground, and it shows good (VR case to engine block using ohm meter). Blue wire (voltage sensing) shows exactly the same battery voltage as when I measure between the posts of the battery. Have pulled the green wire while motor is running. Alternator stops charging. Putting it back on and the alternator puts out 34+ volts again.

Have replaced the ignition switch with new one, but that didn't help. My battery is at 11.5 volts now, so I'm going to put it on a charger overnight to bring it back to full charge and try again.

Thanks for all the brain power you guys are putting into this for me. It's much appreciated.