I have an 03 Trailblazer. Have 7 pin connector, and 4 pin adapter. hooked up according to manufactors diagram,NOTHING WORKS!! I'm suppose to have voltage on brown wire for running lights, but I don't. I have voltage on yellow wire instead and running light work fine. However, no blinkers and when I hit the breaks they go off. I've switched the wires every way I can think of and still nothing is working properly.