I have a '99 2500 Laramie without the factory foglights. Does anyone know if the wiring for the fog lights there and just needs to be id'd and hooked up, or because it wasn't optioned from the factory, it isn't in the harness? Anyone used the factory wiring to add fog/driving lights like this to a truck that didn't come optioned this way? Where is the switch placement for the factory fog lights? Thanks.