I know this has come up several times, and I am still looking into the issue. But, is there anyone that can point me in the right direction to correct this issue? Bought a brand new trailer and during the light test, the Right Turn signal does not work. Testing the trailer, all the lights are working correctly. Truck lights are all working fine, this issue appears to be at the trailer wiring. I did check the factory trailer plug harness (behind the trailer plug on the truck) and nothing for the right turn signal. I do have a T connection for a bed plug, but neither plug on the truck is working in regards to the Right Turn signal. I'm reading that it could be the TIPM since all the lighting does go through that. How do I go about fixing the issue? I've got to get this fixed ASAP.