I'm posting here because this gets more traffic then the electronics section. So I'm finally getting around to wiring up my 50" curved light bar and decided to go with some OTRATTW switches. I got the Contura V switch, green lower light and red upper light with the lower being independent...

I purchased a used headache rack (not sure of the brand) and it has four wires (green, yellow, brown, and white) hanging out of the rack. The rack has four oval led red lights at the top of the rack and there is a trapezoidal opening cut so that the factory CHMSL (center-high mount stop lamp)...