Mine was wired wrong when I got it. Grab an electrical tester and figure out which lights are which on the bike and you might have to move them around in the plug for the light. The wiring diagram I got with mine had all the wires labeled properly, but they were in the wrong places in the plug. I have a pic of the correctly wired plug somewhere, but I'm running to work right now. I might be able to find it a little later.