The factory switch for 98 and up will not work unless your truck is programmed for fogs.There is a way around this.Here is mine...
http://www.zr2.com/frequently_asked_questions/modifications/headlights/98_fog_light_switch.html then here is another http://www3.bc.sympatico.ca/MyZR2/Pages/Fog Switch.htm
http://www.zr2.com/frequently_asked_questions/modifications/headlights/98_fog_light_switch.html then here is another http://www3.bc.sympatico.ca/MyZR2/Pages/Fog Switch.htm