the dome light wont go out and the door ajar light stays on . i think its the driverside door . weres the switch on the door jamb ?

 

Here's how to get to it if want to replace it. Alot of times a good shot of contact cleaner sprayed into door latch mechanism will fix the problem. The instructions are for Explorer but procedure should be identical.

Door AJAR Switch Replacement on 2002XLT w/Photos - Ford Explorer Ranger Enthusiasts "Serious Explorations"®

 

I drowned mine with about a liberal amount of WD-40 about 2 or 3 years ago and it hasn't bothered since.