Well see, I actually have no idea how old the alternator is, my guess is, that it is the original. The engine was replaced about 20k miles ago with an engine with half the miles on it...75k miles...and whatever could be used from the old one was reused on the new one. And yes, the wiring is bad... there are some places especially under the battery where the rubber insulation around the wires has cracked and they are exposed...for this reason if I hit any kind of puddle in the tour the thing damn near shuts off....there are so many possible reasons for this flickering it isn't funny. I just suggested the alternator because it whined so much.
