Got in the truck tonight and no headlights. dash lights, tail lights, high beam indicator, and front marking lights work. No high beam. Now low beam. No blown fuses. Pulled out dash and headlight switch and all terminals on switch are hot ( have power, not temperature hot) except for the light blue colored wire at the very rear of the switch. The switch and plug look like new with no sign of burning. Anyone know which wires at the firewall are headlight that I can test them to see if juice is getting there? I just checked all the lights last week and had one bad brake light bulb but every single light burned then. 
