I really appreciate the input here because I am stuck. Ahy: yes, stock pulleys. I have two other ex police cars with the 100 amp alts and no dimming. It does have the same heavy gauge wire on the alternator like the other cars and I have cleaned it up real well too. The flickering now has me much more concerned than the dimming. The dash lights, clock on radio, etc. flicker and especially when I have a turn signal on. If I can at least try a few things first then maybe take it to the $85/hr guy to check it out. Thanks!