Installing one wire alternator

Joey4speed said

Simply said, I had 2 field wires on the new harness, green and blue. Connected (green) to the single field tab on the alternator.
I just left the other one disconnected, and it has been charging properly for 2 years now.
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You are confusing the issue, or you are confused. That alternator ended up being one field terminal grounded, for the 69/ earlier system. That is not a one-wire system. Further, replacement alternators are a real shot in the dark, as some that SHOULD be isolated field were incorrectly grounded by the "rebuilder." So, it's a can of worms