LMC truck and Geno's Garage both sell the harness, with install instructions. I think the geno's version is heavier duty? But, I got the one from LMC truck, and it works just fine.

 

Take care in selecting the correct relayed headlight harness. Some are for the standard headlights and some are for the sport headlight conversion. I purchased this harness a while back for my sport headlight conversion - https://ceautoelectricsupply.com/pro...th-fog-lights/