The door ajar light will not go out when the doors are closed. Sometimes the light will go out, but most of the time is stays on. I am unable to find the door switches and really don't know which door it is. Is there a module or switch somewhere I can check? Thanks

 

I am having the same issue with my 98. It's done it since I've owned it and only happens occasionally. I will dig into this and let me know what you come up with...

 

Very common Ford problem. The door switch, which is in the latch mechanism has dirty contacts. I've found that spraying stuff like WD40 into the mechanism is generally enough to clear up the contact problem for a while. It's really too bad they stopped using that simple little push switch that once was on the door near the hinges.

But give the WD a try and see if this fixes your problem.