Sounds like ground is good,but body/engine/battery need good clean connections. And fan neg needs to be checked too. Reg is on body,alt is grounded to engine. Wierd things can happen.
trying to check every connection as I am checking parts in the system. again, sometimes it's the easy things that stump us. getting info on readings, but checking in too. thanks Tooljunkie, and everyone for that matter.
