Shift Interlock: Description and Operation

The brake shift interlock system has the following features:
^ All vehicles use a brake shift interlock mechanism consisting of a shift lock actuator attached to the steering column.
^ This mechanism prevents shifting the transmission out of the PARK position unless the brake pedal is applied.
^ When ignition switch is turned to the RUN position, the shift lock actuator is energized, locking shifter in PARK position.
^ When brake pedal is applied and the stoplight switch is activated, the brake shift lock actuator is deactivated and the range selector can be moved out of the PARK position.