Brake Shift Interlock System - Column

The brake shift interlock system prevents moving the selector lever from the PARK position until the brake pedal is applied. The brake shift interlock system consists of a Brake Shift Interlock Actuator (BSIA) mounted at the upper end of the steering column. When the ignition switch is in the RUN position and the selector lever is in PARK, the BSIA  is energized when the brake pedal is applied. This will allow the selector lever to be moved from the PARK position.