Did your truck come with the fog light option? I assumed not, since you are in the process of installing them! If this is the case, you really need to do the install as if it was any other regular set of aux lights. You'll need to wire them in with a relay triggered by a switch in cab, or the low beams, or both if you desire. Either way, I strongly recommend that you but the factory service manual, which comes with incredibly comprehensive diagrams on every circuit, switch, junction, and piece of electrical tape in your truck. It has paid for itself in the last year for me just with the chapters on wiring alone.