Parking windshield wipers

Check and see if the motor is reversing when turned to off. The motor should reverse to park the wipers. If it is not reversing, check the ground wire from the motor to the which, (red or yellow, not sure which one) to the wiper switch. To reverse the motor, the switch provides a ground to the motor instead of the body and the parking cam should rotate the opposite direction which lengthens the connecting arm and pushes the wiper arms down to the bottom of the glass.