Are they any engine trouble codes present?
It sounds to me, like there is a huge power drain on the battery.
Did you replace the alternator, and replace the battery at the same time? If you only replaced the alternator and used the same crappy battery, you may have caused what is known as "Alternator Death" which can occur when a new alternator is forced to charged a dead battery, and exceeds it's power limitations and shorts out the alternator's reostat. Test the Alternator to be sure.
Wednesday, February 11th, 2009 AT 9:51 PM