Soft top cover opens

The STC control module grounds pin 42 and the pump motor relay "pull" feeds the pump motor and it is grounded through the pump motor relay "push". The inlet valve opens and provides the pump with oil on the suction side and, at the same time, closes the pressure side connection with the oil reservoir. The shuttle valve will be moved by the oil pressure to the side which shuts off the return line.

Since the cylinders for the fifth bow are in their upper positions, the pressure will increase in the soft top cover cylinder (pull) which then will open the soft top cover.