To make the story short, the right side trailer light does not blink. The running lights and left blinker do work fine. Now to explain in more detail I have replaced trailer lights, wires, harness, etc with a new universal wiring kit. (trailer side) The wiring was run with 1 brown wire to each light and 1 yellow to left side, 1green wire to right side. I have a factory four pin plug on the truck side(f150).