Door Disarm Switch
WARNING: This page is about a different car, the 1997 Mercury Mountaineer and 1997 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.