Under dash electrical fire

I got both rebuilt alternators. Both were DOA!!! The first one put out nothing and the second one would not even spin! I found two old double pulley alternators in the basement and the first one I tried worked normally. What a PITA expecting the rebuilt alternators to work right out of the box. At least I now know that my repaired wiring harness is correct.
From 74 to around 85ish I sold parts in two stores. Rebuilts were always "iffy" and it seems like they are way way worse, nowadays