Which of the 3 wires going into the headlight bulb is the highbeam wire? Thanks

 

The highbeam wire is the one on the left (of the 3 wires) if you are looking down at the driver's side headlight harness from the front of the truck. Don't quote me, but I believe the wire color is dk. green with an orange stripe. I just used this wire along with a relay to hook up auxilary lights to my high beam circuit.

 

The wire for the "High Beams" is ***Green/Black***

You can quote me on that too