Alternator Problems

[tacoman]

well everytime i stop the car it wont start so i had to get it jumped off, well i took it to autozone and they said i had a bad battery and alternator (the battery was dead only 3volts) so i got a new battery well when we put it in the voltage stayed between 12volts and 12.5 volts. the guy at autozone told me the alternator was bad so i took it off and got it tested well as it turns out the damn thing is good :?: so why is it good off the car and not good on the car????? well i said maybe its one of the diodes in the alternator that went bad so i got a new alternator $165 and some change, put it on the car and i have 12 volts but after about 2 mins i get 14 volts. and once the car warms up it stays at 14 volts sometimes, and sometimes it don't even charge. so i thought ok its the computer so i went to the parts car around back and got the computer and presto i still have the same problem , i even changed the regulator and still the same thing.

so what the hell i don't get it i haven't driven my G in 2 months now ohh and by the way i dont have a car audio system in it so that can't be the problem.

[JiP]

You cant just randomly go changin things...

It should be close to 14v while idling and driving. Electrical problems are hard to diagnos...I had a similar problem, but I started by checking the wiring first, and it ended up being a bad ground wire from battery to chassis, $10 10min fix.