Ignition Key Lock Cylinder Sensor
WARNING: This page is about a different car, the 1993 Ford Pickup, 1993 Ford F-Super Duty, 1993 Ford Cab & Chassis, and 1993 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect anti-theft control module. Using a digital volt-ohmmeter, measure resistance between pins No. 10 and 26 at wiring harness connector. Resistance should be 145-175 ohms. If resistance is not 145-175 ohms, repair Black/White, Black or Dark Green/White wire circuits, or replace lock cylinder sensor.