70 Dart Stopped Charging

Tell us what color of the 2 smaller wires to the alternator has voltage when running. I assume it has one each of green and dark blue (or black) small wires; please confirm. Are you testing for voltage on the 2 smaller wires with them connected to the alternator normally?

What do mean by 2? Did you take the VR somewhere to be test to show it is OK?

Do you have a voltmeter?