[QUOTE=Baer;2426868]If it were a bad diode, is this something that can be replaced? Or is a new alternator needed?

Yes, the diodes can be replaced, but the biggest problem is being able to find them. The other thing is, there may be another problem with the alternator that may have caused the diode to fail. If you do the test, and you do find continuity between the alternator battery connection and the alternator case or other ground point, you will have your current drain isolated.

__________________
96 E300d