Update: I installed the Hella H4 housings and 60/55 lamps in the XJ sans upgrade harness. OOOOOOOOOhhhhhhhhhh my what a difference!!!!! I can see!!! And what is better yet my wife can see. Since we bought the XJ she has decided it is her vehicle and I can't get her out of it. There are no problems with the stock harness so far. Jon of Kelley's Works in Progress e-mailed me today and said the upgrade charging system stuff is on the way. When it's installed I'll write another update on the headlight and charging system upgrade installation and performance.