Ignition Key Lock Cylinder Sensor
WARNING: This page is about a different car, the 1997 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
Unplug ATCM, located inside glove compartment. Measure resistance between terminals No. 10 (Dark Green/White wire) and No. 26 (Black/White wire) at wiring harness connector. See Fig 1. If resistance is not 145-175 ohms, replace lock cylinder sensor, or repair circuits No. 936 (Dark Green/White wire) and/or No. 397 (Black/White wire). See WIRING DIAGRAM .