Battery draining fast

Bud, where are you located? Ive owned these for going on 25 years now, not much we cant figure out. I got a FSM that has a very thorough wiring section. Shoot me an email address and ill get back with you tonight. The squareback alternators and round dual field and electronic regulators are very easy to transplant and it sounds like you alread have the secomd field wire in your harness...but your new one should be easy to fix too. Id look into maybe a bad regulator. The older ones turn the alternator exciter voltage on and off like a duty cycle with points, whilenthe electronic ones vary the ground resistance to the alternator, manipulating the output voltage.