Then I am sure I am the one in error here. If the old man is sure he has a negative ground system, as I am sure he checked his to the wiring provided, but in 02, they had both PCM controlled and neg ground system. So my bad, I have only ever worked on PCM controlled lincolns of this era. But that is no excuse, I should have read and looked better at my alldata, they mention both systems for this model year. Unless alldata is in typo for this screen shot. I just assumed it was what I am used to working on. SO, obviously, if there is no message center stating a charging system error, and only an idiot light, it is a neg ground system. Sorry to all, no man is perfect, even though I like to think I am.