From what I know the 2000-2001 model Xterras that were 5-spd trans. didn't come pre-wired and you had to buy and install the wiring kit. Then some people on this board that had a manual tranny said that theirs did come wired. If their dealer did it for them, who knows? Hope this helps.

You should lay down on your back and look straight up behind the bumper near the RR tire. You should see a blue cap with 4 little orange (or red?) circles in it. You have to remove this cap before inserting the pigtail.