"I unplugged the factory headlights and used the harness to power the LED's so I can use the factory light switch and not have to install a new switch on the dash. The factory headlights were close to useless."
I did something similar. I use the tractor on the road, so rather than blind oncoming traffic with the LED's, I kept the factory low beam headlights and they operate on the one detent on the factory headlight switch. The high beam wire controls the grille and side-mounted LED's instead of the factory high beams. The front and rear cab lights are controlled via two other switches in the normal spots in the cab roof.