i plugged the 2 harness connections together and then wired red to red, black to black, yellow to yellow, blue neg and pos to blue, green is not used, and then orange neg and pos and orange solid to orange... the unit works but blew the instrument panel fuse and i'm not sure what the proper sequence of wire hook ups is now.. the neg and pos orange wires are for the dimmer, the solid orange says illumination....}