I don't have them, but I believe they're plug & play... all the wiring should be there & it should come w/ a wiring harness & a switch... Here's the page w/ the fog lights at Sparks - check the link for the installation PDF on the top right of the page:
http://trdsparks.com/displayparts.php?Mdl_dtl=570&Part_cat=24&parts_id=1571
http://trdsparks.com/displayparts.php?Mdl_dtl=570&Part_cat=24&parts_id=1571