if anyone else has this same problem with, do NOT let it go too long. mine started 5 miles into my 35 mile commute. on the last mile, the brake and battery lights were on continuous at any rpm. when i went to leave work, the problem was still there. a volt meter read 12.6 v not running and 12.2 running from idle to 2500 rpm. luckily, we have a maintenance shop at work so i can change the alternator there tomorrow.