Thanks for your help thus far. I now need to test the motor load, repeatedly opening and closing a door, for hours, then days… How can I set up a circuit to cause the motor to reverse direction, automatically? I have many (momentary) N.O. / N.C. snap and push button switches. I do not currently have any latching/toggle switches, but could get them. I also have many automotive type relays available as well. I can acquire additional supplies as needed.