How do i find the fuse for the fog lights on top of my 2003 jeep liberty?

i have a 2003 jeep liberty renegade. it has a light bar on top with 4 fog lights. the lights do not work. in the owners manual the fuse diagram has a fuse for the front fog lights(below the headlights) and for the rear headlights. There is not a fuse on the diagram for the light bar and i dont know what to do. How do i find the fuse? Or do i need to change the bulbs, because the button on the inside says that the lights are on when you press it but the lights do not turn on.