Alternator or VR issue?

Sooo.
The first two places to check for shorts are:
1. The wire from the regulator to the field terminal.
2. The field terminal to the rotor.

I would probably first measure resistance from the green wire's connector to the regulator, to ground.
This is just to see if I'm on the right path.
1. Then disconnect the green wire's connection at the alternator, and measure again. (a)
2. Measure the resistance between the alternator's field terminal and the alternator's housing (ground). The grounded brush will give the best reading. (b)

Try to find as clean of a location as possible for the probes.
Check the zero reading (touch the probes together) even if its a digital meter.

(a) There should be infinate resistance, no connection, between the green wire and ground.
(b) There should be measurable resistance between the field terminal and the ground.
- no resistance is a dead short. probably bad insulation at the field terminal brush
- for other resistance readings, I'll hae to dig up my notes. The shop manual has the resistance of the field windings from slip ring to slip ring. Then add some resistance for the carbon brush.