1999 nissan altima. Battery and brake light came , had it tested at o'riley alternator tested bad voltage regulator. Replaced with rebuilt alternator. Cranked car, lights are off everything is good till I crank car again, lights are back on. Went back to o'Riley and rebuilt alternator tested bad 12.4 volt output. They gave me another alternator but my question is did I just get a bad alternator or is there something frying them? Does anybody have any ideas of what I could check?
There'd be no way to tell for sure if something was frying them, but would suggest to you this would be highly unlikely. It is completely within reason for the rebuilt alternator to have gone bad ... that's why they have a warranty. Yes, it's a PITB to take on and off, but at least it didn't cost you anymore than an extra trip to the store.