I have a 2008 250 xlt that did not come with fog lights. Orered oem fog lights and wireing harness that plugs into plug next to drive side light. Noticed that I do not have switch for fog lights ofcourse but looked up diagram and tried jumping gray I believe wire for fogs in factor switch to black wire if I remember correctly to get fogs come on with headlights and did not work. Truck has relay and fuse for fog lights. What do I need to do to hook up factor fogs or do I need to just cut wire and tie into headlights?