I had the problem with the first one, then bought a remanufactured one from advance auto and had the same problem and then a third one, this time from Robert's and Son and had the same problem so I'm fairly certain it is not that. Here's a link to the original problem I solved before I came upon my current minor issue with the dim lights and voltage jump:
http://www.240sxforums.com/forums/s1...-charging.html
*sorry for the double post. It was an accident