My heritage was pre-wired for the factory fog light kit I bought the kit listed on the ford website for my truck and saw that it had a cheap universal switch not the cool integrated factory light switch but, my truck had all the relays, fuses and wiring I just went to a salvage yard and bought a headlight switch from a 2000+ or newer F150 or Expy with fogs. workd like a charm.

 

Thanks for the tip