I own a '97 Expedition with 119,00 miles. I am having a similar problem with my "door ajar" message. I have recently been experiencing problems with my brakes I believe is directly related to this electrical problem. I know that the ’97 Expedition was recalled for a 4-way electrical switch I believe under the dash. The only problem is I do not know the name or location. Please let me know if you find a solution.
Found this thread under “Expedition GOing haywire?”
Had a similar problem but more electrical things were going wacky. Door locks, lights, displays, and radio. Also this would only happen in drive and reverse, everything worked fine in park and neutral. Took it to several places and spent thousands to figure it out. Turned out water was getting in the fuse box and wasn't able to get out. Drilled a hole in the box and haven't had any problems since except the digital mileage display doesn't always show.