I just paid a core charge at Advance, instead of giving them my old one, since it's still good.

I did what I tell everyone to not do - buy parts without doin' diags. And of course, I put a new one in mine, thinkin' the old alternator was toast. It wasn't. It's a short in the signal TO the alternator, which is why the new one didn't put out either.

I took the old one in for a bench test, and it was good as could be. I told them I'll keep it, since the core charge is $16, and I can sell it for more than that.

You beat $16, pay postage, and it's yours. Google Advance Auto Snow Hill NC, and you can get the bench test results - the guys there all know me (ChuckB).