Originally Posted by JOHANSONFAM
My door ajar light will not go off and my dome light will not turn off. Has anyone had this happen? Any help would be greatly appreciated!
FIXING THE "DOOR AJAR" MESSAGE
Submitted by Steve L and pro-five-oh / 11-07-04
If you find your Lincoln giving you this message even when you know the doors are closed, don't worry! This is a minor problem with a very simple solution.
The problem is that there is a sticky switch in the door latch mechanism. This switch is telling the computer that a door is open, even when it is not. Keep in mind that it may not be the driver's side door that is at fault, so you might want to do all 2 or 4 doors, depending on your model.
At each door you will see the latch mechanism. Just above these latches inside each door is the switches. To unstick these switches you will need 2 types of spray lubricant. Use WD-40 (or equivalent) and a can of silicon spray lubricant.
With the plastic tube attached on the WD40 you will spray inside the latch and in between the latch to get the spray to lube the switch. Flooding is preferred. Go to each door and do this. Open and close each door multiple times until the switch is free and the indicator lamp goes out and the monitor message does not appear.
Next apply the silicon lube in the same fashion. Why is this necessary? WD-40 loosens and penetrates to unstick the switch. Later it will become tacky and cause the switch to stick again. The silicon spray lube will wash away the WD-40 and replace with a silicon coating that will not cause stickiness as it dries. Be sure to get between the door latch and door metal and spray upward this is the best way with no door disassembly required.