Originally Posted by
gsrhach
Its white and i believe like an eight guage wire it screws down into the fuse block under the hood. The port it screws down into is the furthest port away from the firewall
Ok, so that tells me that the alternator is probably not getting turned on or something like that, and the difference in voltage is just the difference between no load (disconnected) and whatever the battery voltage is (connected). Why that is you'll have to find out for yourself.
Post your findings when you check things out, I've got to get back to writing my report so I'll check back later.