[VetteVet]

Well I think you may have found the problem with the key switch. What I meant to say was that the pink wire should be hot only when the key was on, but I was being rushed to leave so I missed the last part . good catch on your part, this could have been confusing.

What's your plan? New key switch? or can you fix the old one?

I'm curious what you did to make the alternator into a one-wire from a three wire because the one-wire uses a different regulator.