Before replacing the alternator, test the charging rate first. When the indicator light is steady or blinking with engine running, test the charging rate.
Other areas to check would be the ground circuit and also the alternator bracket. Clean the alternator bracket and retighten the bolt to ensure a good ground.
The problem might also be a bad PCM or multiplex control system instead of the alternator.
Tuesday, April 6th, 2010 AT 12:18 PM