battery not charging

[kawman10]

ok guys, I'm getting sick to my stomach trying to figure this truck out... I bought a new external regulator and didn't help, got alternator tested and was bad, but new on one, and still not chargin battery. I found some bad wires from the alternator to the regulator and have fixed that problem and tested with the multi-meter and are good from alternator to regulator and still not charging battery, only running 12.XX at the battery and at the postive on the alternator.

Guys what else could the problem be!! Need all the help!!!! what do I need to look for or test?

thanks all knowledgeable ones!