65 Barracuda - No Charge from Alternator

I divide these problems into "areas" No particular order
1...The charge (output) circuit. This is the big black wire, connects to the stud, carries the main output through the bulkhead connector, through the ammeter circuit, and back out to the battery. THIS IS NOT FUSED

2...Field wiring circuit. This is known also as "IGN1" I call it "ignition run." Comes from the key, comes out into the engine bay, and (depending on year/ model) feeds the ignition sysem, and the VR. On newer cars it feeds the alternator field (70 and later) and feeds electric choke and or smog devices if equipped. THIS IS NOT FUSED

3...One single green wire goes from the VR F terminal to the alternator F terminal

3....The alternator itelf
4.... The VR

A "quick test" is to clip a meter to the alternator output stud and run the engine at fast idle. "Rig" a jumper wire from the battery, and after pulling loose the green field wire, feed battery power to the alternator F terminal. This should cause "full output" and the voltmeter should rise some.

If it rises not at all the alternator is not putting out
If it rises WAY high, maybe 18 -20+ volts or more, the charge wire/ ammeter circuit has problems
If it rises "some" up 15-16V it is charging "at least some

Next, Reconnect wiring, and now disconnect VR wiring. "Rig" these and jumper them together. Rerun the test. If altlernator is good and all wiring is good it should now charge--you have bypassed the VR

If this test shows OK replace the VR. Make CERTAIN that the VR is GROUNDED. Clean/ scrape the bolt holes on the firewall and on the VR flange and mount using star lock washers.