Ok so here's the story: My battery has been dying a bunch these past few weeks, so i tested the alternator and it wasn't giving a charge, I assumed the alternator was bad and put a brand new one on. Now i hooked up the voltage tester to the battery with the new alternator and the car still seems to be running off just the battery (at about 12 volts). So, like anyone else, i assumed it was an issue with wiring, maybe an old wire had stopped working or something, so to make sure I ran a wire straight from the BAT terminal on the alternator to the positive battery post. STILL no charging, does this mean it's an issue with the battery? I've been charging it with an external charger without any problems at all, so i don't see why it wouldn't take a charge from an alternator, any help would be awesome.