I guess the takeaway from this is that '05 STs-on have the fog light lead, as evidenced by Night Hawk and myself. IDK what year James Taylor's truck is, since he's got a 2011 listed under his name.
Seems like *some* 2002-2004 STs don't have the lead, as Icywhite (2004) and Lil_Ram (2003) report. However, an SLT from this time might have the lead even if there's no fog lights. And ST-8 mentions below his '04 ST had the lead.
And from 2006-on, with CANBUS, it appears the truck needs flashing to activate the lights, even if the harness lead is there, as SchroederMP noted.
The factory kits are now hard to find, if not impossible. So if a truck has the fog light harness lead and one wants to have a factory setup, jumper 56045501AC in conjunction with a new switch is probably going to be the way to go.
Last thing is even with a factory harness lead and either the fog light kit or individual components, there might not be a relay or fuse there as the truck wasn't equipped with them from the factory.