I have a 90' Camaro TBI with a 350 swap and the positive battery cable going to the starter accidentally grounded on the oil dip stick from improper insulation. We fixed that issue. Car starts fine and drives fine but the alternator does not charge.

Alternator Has a 2 wire plug, along with the thick 4-8 gauge positive battery cable wire with nut coming off of it.

The Red Wire on the plug shows +12V (confirmed with multimeter)
The Brown wire on the plug:
-Shows no Voltage
-No Continuity to the battery cable (+12v wire)
-No Continuity to groud
-So its an "open" wire I suppose?

The Thick 4-8 gauge wire with the nut (red wire) shows only 0.46 volts, though it obviously should show battery voltage regardless of key position IIRC.

I checked the Crappy Wiring Diagram the Haynes Manual shows, and it shows the brown wire running to the Fan fuse (which is fine), though my multimeter is showing 0 volts on it.
The thick 4-8 gauge wire shows it going to the battery though there is I believe a fusible link, but either I dont know the location of it or I cant find it.

Any Advice Guys?
(Alternator is good, it is brand new & has been tested at autozone)