I am having problems with the factory trailer pigtail. I have tried 3 of my trailers and none of them have the driver side blinker. But the trucks blinker is working fine. I checked the voltage at the yellow pin on the pigtail and I am getting a constant 10Vdc. But on the green I am getting 12Vdc and it is off and on like it is supposed to be. I checked the fuses under the hood with no luck. Has anyone seen anything like this before?

Thanks,
Robert