From the wall control the white wire with the red trace goes to terminal 1 and the plain white wire goes to terminal 2 along with the two white wires from the door sensors. The wires from the sensors with the black trace goes to terminal 3.

Hello, I have a craftsman 3/4 chain drive, model 139.18450D; mfr date Aug 2006, bought in Sep 2006. One day recently, it stopped moving the door. Currently, troley is stuck at open door position(6 inches away from the stop bolt). The only response is, some click sound and light also turn on as normal behavior but no movement from the motor. I have tried power off(for few days)/on but no help. Code light is flashing 5 times. I have tried pulley/troley without engaging it and still no luck. The gears are all look to be normal, nothing seems broken or worn off. While unscrewing side panel, I removed the panel in hurry and now I can't find open connector for the blue wire coming from logic board. It would be helpfull if you can tell me where the blue lonely wire coming from the logic board goes to? ground/black+/white-
Chamberline PD752D and PD752KLD user manuals seems to show almost identical parts as I have in my craftsman GDO.

Any tips would be great. thanks in advance, Yosuf