Thanks for the reply. All connections are clean and tight, and all wiring is stock. There are a few things that are not connected, the heater relay, the bcdd, raido, 10 mph switch. This is how the truck was when I bought it 4 or 5 years ago. I replaced the alt.,regulator, battery and cables 3 months ago, the fuse box was cleaned a month or so ago with and has all new fuses. I will check the alt. output as you suggest and post the results.
Thanks again,
Will