i have a 92 camry sedan and my alternator went bad on friday. i replaced it and it just went bad again. what could be the problem?
P.S i have a 750 Watt subwoofer in the car

 

so its been tested and it turns out bad?

if so you may want to consider getting a capacitor so it puts less strain on the alternator. I suspect the older alternators do not put out as much as the new ones, so thats a lot of stress ur putting on it.