Charging issues

Sounds like it. Does the VR have good solid 12V with key "in run?" Is it for certain grounded? It "seems odd" that with a simple problem like the field not grounded, that the VR might also be bad.

Before replacing VR, make some more checks---you know the alternator works

Disconnect green at VR and at alternator, check for grounding, it should be "open" to ground. Check continuity end to end. Further check charging by removing VR and jumpering the blue and green wires together at VR and hook up alternator "noormal" Re -run engine, see if voltage comes up. If so, has to be the VR is bad. MAKE CERTAIN it is grounded