I replaced my alternator about a week ago. The alternator was seized it shredded the accesory belt before i figured it out. I bought a new AC delco off of Rock Auto. It was working fine the only I noticed was it didnt show it charging right away on the Atari gauges after a second it would show it charging. Now all of a sudden I get the Alternator display on my DIC. The battery at rest is ~12VDC too low I know but with the car running the battery voltage dips to 11.5. I did not replace the tensioner car has 87xxx miles. Obviously the alternator is not charging but this is brand new any ideas?