Good thinking, but I am sure. I pulled it in my garage this morning and checked thangs with my multimeter. At the white connector, I was getting 14v at the blue wire, and around 7.5v at the red/blk. Went to go check voltage at the tach, and it was working. Shut it off, restarted it, no tach. Checked voltage at the "W" terminal, 0.2v. Checked the other, 12.4v. Looks to me like the alternator is being inconsistent.
However, I did notice an error on my part. Maybe? If you look back at the alternator picture, you can see where I had the blue wire connected. The tab just north-west of that used to have a little "T" connector on it for a small bolt to be threaded into it. I took it off just before the picture. Anyways, I relized that I may have been using the wrong connector all the while. When I check voltage at the tabs, the one that I WAS using is 12+v, and the other is 0.2v. The wire itself is 12+v, so I am guessing it would prefer to go to a ground instead of another +
By this point, it looks like my alternator is NOT working
As I have been running it while typing, the battery is already at 12.0v
With the white connector plugged in, It is seeing .6v on the red/blk wire. When it is plugged into the NW tab on the alternator, the voltage is showing 1.67v at the white connector.
This alternator is not old at ALL! It should not be giving me any grief!