i have a 2003 fx4 supercrew, i just installed k/c lights on my brush guard, i have them hooked up to a switch right now, i was wandering what wire i could hook them to so they will come on with my highbeam headlights.

 

Here is a quick diagram on the way to wire the AUX lamps so the relay is triggered by the high beams.
You would use option B in the diagram. Remember to check the wire colors with a test light or meter, prior to splicing.


Good luck !