No reed switch just a microswitch operated by the SS lever, where the power goes onto the board it's about 10v so I think it's controlled by a processor on the main PCB. I checked it when I was looking for power for my internal fan.Still non the wiser. This fridge doesn't have a reed switch. I'm not getting 12v at the light connector. Is there a separate fuse or possibly a bad contact on the PCB ?