Circuit/System Description

With the ignition in the OFF or ACCY position, the park lock solenoid is de-energized and locks the shift lever in the park position. With the ignition in the ON position, voltage is supplied to the park lock solenoid. The park lock solenoid energizes through a permanent ground unlocking the shift lever.

With the ignition in the ON position, voltage is supplied to the stop lamp switch. Voltage flows through the normally closed contacts of the switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is depressed, the contacts in the stop lamp switch open de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.