[KaIIen]

I have already used a volt meter and when the brakes are pressed, no voltage for the right side. But the same pin gets power for 4ways and turn. And yes, I should have mentioned that the lights on truck all work fine.

And no, this is factory. I got her brand new, and this is how it came from GM. I double checked, and indeed the bundle of wires plugs into the back side of the trailer plug and goes up front. As I said, I lose it when it goes on top of the gas tank. Up towards the front, there are at least two bundles so I don't know which one runs to the back....