The dimmer switch lives in a wet, dirty, hostile environment under the floorboard, and carries the full current needed to run the headlights. A new switch and a set of relays out on the radiator support close to the headlights makes a lot of sense. Then all the dimmer switch has to do is carry the small current needed to turn the relays on. That also protects the headlight switch from heavy current, and you get brighter headlights to boot!
Jerry
Particularly hostile in my truck. It’s gross under there. This rig eventually needs a full re-wire so I will keep the relay thing in mind.
And to the fella that suggested swapping the wires….brilliant! That might have eventually occurred to me after lots of futzing around. But no guarantees.
