I see one thing missed on this dicsusion, you have two different field feeds, maybe one of them has a problem on it in the connectors or corrosion or I have seen a bad connector on one of the the feild input wires (It had broken most of the wires at the connector, maybe it had one or two still flowing current, not the entire bunch of wires like it should have been) cause charging problems. The feed wires are 18 gauge if I'm remembering correctly I replaced that connector and it got ALL BETTER Lots of gremlins out there of all kinds for Murphy to use to test us against our troubling shooting skills