Voltage regulator perhaps?? I don't know if our cars have an external unit or not. If it's inside the alternator, then I guess it can be ruled out (since it's already been replaced).
'03 300b - all the bolt-ons (SOLD)
'93 Mustang Notch - restored w/ all the bolt-ons (SOLD)
'97 F350 Powerstroke 5 spd, 4" straight pipe, 5" stacks, Rockford system, 35" tires...(SOLD)
'95 Lightning - bolt-ons and susp (Totalled)
'93 Stang Notch - full resto with autocross susp (SOLD)
'01 Lightning - 3"/4" drop and full bolt-ons... FAST.