I think you are overthinking, and you cannot make such continuity checks on wiring. They are meaningless
IF you are certain that the alternator does not have a shorted/ grounded field, and you can double check that by:
Connect the blue wire, leave the green unconnected. Turn the key to "run." Measure voltage and both field terminals should show full battery voltage. Now take a jumper and ground the second field terminal--the one not connected. Should see a small spark
Confirm, now, by running engine. With blue only connected to either field, and second field terminal bare, alternator should not charge. Again, field terminals, both, should show full battery
Now jumper the unconnected field terminal to ground, and alternator should charge "full" depending on RPM
I think you have a bad VR, or VR is not grounded
