IF you have the same the same light that I have, I have a low and high in the amber light which does low or high brightnesses, and it is in the lower bumper grill, I hooked the low side of the light by tapping into a marker light, so it's on when the marker lights are on. The high brightness I hooked into the fog lights, so when the fog lights are switched on- it's on high. I did not need to install any new switches.