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what makes the door adjar light stay on,and locks to operate abruptly? on 2002 Mercury Mountaineer

it used to be every now and then ,now it is permanently.

the switch in the door jam or door hinge
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1 more answer
door switch in one of the latches is stuck. try spraying wd40 into the latches at each door. open and close doors several times. will sometimes work. if not, take to a dealer. they can hookup and tell you which switch is bad.