Could be brown/white - the wire is pretty old and the light I am using isn't that bright. The wiring schematics I have show an orange wire as the hot (which could be the wire to the firewall). Either way, it does not make sense to me that I can get the lights to work by connecting the light blue directly to the hot, but it doesn't work if the light blue is connected to the correct pin on the switch. I think I'll just connect the light blue to the running lights wire and be done with it. At least I'll have headlights when I engage the switch.