Short to ground in my alternator?

I found this.
https://www.forabodiesonly.com/mopa...rnator-and-voltage-regulator-question.485901/
So at this point (we on this side of the screen) can't assume anything.

As far as the alternator alone goes.
Diconnect the battery and alternator. if there is just one terminal (stud) check for resistance to ground. Should be infinate.
If there is are two field wire connections. The resistance to ground should be infinate.
if one of the field wire connections is grounded, disconnect the ground wire or remove the brush - which ever is appropriate.