Question about 2003 Mercury Mountaineer

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Keeps saying a door is ajar when it is not. It acts as if it has a loose wire but it does everything whether its moving or not. Inside light blinks, the chime goes off and it flickers between door ajar and the info. HAPPENS CONSTANTLY! I checked all the door latches nothing is loose all the doors and hatches are closed tight.

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I would bet you have a bad door switch. The switch is attached to the door latch (the part that holds the door closed. The hard way to figure out what is gong on is to, one at a time, remove the door panels, unplug the switch, and see if the problem goes away. The easy way is to scan the GEM/body module and watch door data. The door that says open when it is closed is the door to concentrate on.

You can also try spraying penetratinglube into the door latch area. Sometimes this will loosen up a stuck switch. Open and close the door several times after spraying.

Posted on Oct 07, 2010

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