If I remember it is a button in the door jamb. I changed it on my old Ranger, but that was about 10 years ago. Take the door panel off. You will need a mirror or either enough room to be able to look in. I think it was a pain in the butt to get to.
shoot some wd-40 or lithium grease down into the latch and cycle the latch a few times. believe me it works. mine did that and i even changed the latch assembly only to have it come right back. wd- 40 did the trick and it hasnt done it sice.