1995 Chevy Astro 4.3. Syptom: Won't charge. Friend had battery tested and they said it was fine. I checked with carbon pile load tester and it was junk. So he then tells me that they said alternator was bad will you change it. So I remove alternator and took to Autoblown as he asked me to do. I asked for alternator but I wanted this one tested. They tested and it showed good accross the board and I made them test it 3 times. So my friend says he will put it back on and put the new battery in and see whats going on. He calls back and says it's togethor, would I come take a look. I test charging and 12.0 volts, not charging. This is a 1 wire alternator, one main power, case ground. I have 12v on the brown wire at alternator and 0 coming out. Am I idiotic by thinking this alternator is bad. I checked the pin for corosion and pinched the female pin at regulator terminal. I know it tested good but if you have a good ground a 12v at alternator this phucker should charge right??? Other note he did change the starter, and i see that the power wire goes from alternator to starter B terminal. Seems like if he messed that up it wouldnt start. Theres o volts running at main power off back of alternator. Thanks for any help sorry for the run ons..