2002 Ford Explorer door ajar alarm

2002 FORD EXPLORER
75,200 MILES • 6 CYL • 4WD • AUTOMATIC
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FZAB
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When I put the vehicle into gear the doors automatically lock and a warning chirp is heard. Every few seconds the doors keep re-locking and the chirp keeps going off. While this is happening the door ajar light will come on and off. The door ajar light doesn't come on every time the vehicle does this. I have repeatedly opened and closed all of the doors and the doors still keep re-locking and the chirp keeps repeating. It is starting to drive me crazy. Any suggestions on what's wrong or how I can fix it.
Aug 1, 2008 at 2:37 PM
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KHLOW2008
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Hi fzab,

I would suggest checking for a bad ground connection at the right "D" pillar.

Does the door ajar indicator show which door is not closed?
Aug 1, 2008 at 4:05 PM
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FZAB
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No it doesn't show which door is supposed to be ajar.
also, where is the right "D" pillar located?
Aug 1, 2008 at 6:57 PM
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KHLOW2008
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Hi fzab,

"D" is the last body pillar at rear door/tailgate.
Aug 1, 2008 at 11:12 PM