TN65S Alternator / charging problem, alternator tests okay

[bdsoper]

I'm new to the forum and of course, I need some help.

I have a TN65S that isn't charging. The alternator tests fine but when installed back on the tractor, although the constant hot wire is hot, the key hot wire is not energized. Any ideas?

 

[Coyote machine]

Welcome to TBN. :thumbsup:

Does the key switch start the tractor? What voltage reading is present at the battery when the tractor is running?
What voltage is present when the engine is cranking to start? Have you checked the chassis ground at the negative cable from the battery? Have you checked the fuse box and any relays to make sure if anything is loose, corroded, chewed by rodents?
You removed the alternator and had it bench tested? Does it have a built in voltage regulator?