Suddenly my door ajar light is stuck in the on position as well as the dome light. I checked to make sure all of the doors are closing properly like 3 times. I noticed that there are no switches in the door jamb, so where are the dome/ajar switches located?

 

The "switches" are located in the door where the latch pivots when it hits the striker ****. get some good lube, and spray some in and on the door latch parts then open/close your door a few times. this should free up the "switches".

 

Thanks for the info. I'll try that.

 

Yes, common issue with the latch switches on the Ford Trucks, usually a shot of lube will free up the switch.

Google: ford ranger door ajar

lots of pictures on what to look for.