The door ajar light will stay on when the door is shut. Where is the door switch

Problems is system alarm failed then mess up anything. I know where is it. Behide radio disk. You have take radio out and disk out and be on left side and u will see it black box that problems same my truck

I have had the same problem in my ranger, the door latch in the door has a sensor that is notorious for shorting out. you can take the panel off the door to access it and replace it or just dummy wire it. or you can pull the number 25 fuse in a pinch and that shuts it off.