The main head Lights have to be turned on or on automatic. When you turn the lights on manually, push the light button. That will turn on one set of fog lights. The AUX 1 will turn on the second set. And yes, make sure the cover is off.Probably a simple solution, but how do i turn on the Rigid fog lights. Tried the aux switch and didn't see it turn on. Am i missing something? Also how is the illumination?