Door Disarm Switch
WARNING: This page is about a different car, the 1998 Mercury Mountaineer and 1998 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Measure resistance of door disarm switch with key removed from door lock. Resistance should be more than 25 k/ohms. Measure resistance with key in lock and unlock positions. Resistance should be less than 200 ohms. If resistance is not as specified, replace door switch.