I have a camera that I wired up and it works fine when you short the two wires together. I wired the sensor and it tested out ok with the test light. Once I wire the camera to the sensor the camera will not activate, but the LED still works properly. I use the canon PF and the ms20 board with a 12v reed relay. Can the relay be bad, and the LED still work? What elst could it be. I know it is not the way I have it wired. I have checked and double checked the wiring.