Shift Interlock: Description and Operation

DESCRIPTION
A brake/shifter interlock mechanism prevents shifting the transmission out of the PARK position unless the brake pedal is applied. The system consists of the following components:
- an actuator assembly attached to the key interlock assembly
- necessary wiring

OPERATION
The system operates as follows:
- The actuator is energized when the ignition switch is turned to the RUN position. This locks the shifter in the PARK position. When the brake pedal is applied and the stoplight switch is activated, the brake shift lock actuator is deactivated and the selector lever can be moved out of the PARK position.
- The ignition/shifter interlock cable locks the transmission range lever selector in the PARK position when the ignition switch is in the LOCK position.
- It also requires the transmission range lever selector to be in the PARK position to turn the ignition switch to the LOCK position.