Shift Interlock System
WARNING: This page is about a different car, the 2003 Mercury Mountaineer and 2003 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The shift interlock system prevents the shifting from PARK unless the brake pedal is depressed. The shift interlock system consists of a shift lock actuator mounted on the steering column housing near the ignition switch. If the ignition switch is in the RUN position, the shift lock actuator is continually on unless the brake pedal is depressed.
If the selector lever will not move out of park with the key in the ON position it will need to be unlocked manually.