Lonnie, the door Ajar switches are on the inside of the door (see attached diagram). To replace it you will have to remove the door panel, the water barrier etc. To determine which door has the problem, open each door with the key in the on position. The door that does not make a chime is the problem door. Remember that the drivers door makes a different sound. [https://www.youtube.com/watch?v=YoVXdd0emsw|This video] should help you with the door panel removal.
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