timed 12v relay for power folding steps

Both motor wires (Pin 30 of two relays) will rest at ground going to the motor. When either relay is energized the ground will be disconnected and 12vdc will be connected to Pin 30, thus outputting 12vdc on the motor wire. The diode that needs to be connected to each motor wire will only allow 12vdc to pass through it. So, what you'll end up with, after the two diodes are connected to each other, is a wire that will go to 12vdc whenever the system is trying to extend or retract the boards.Kevin Pierson