Can someone tell me what relay controls these lights. The lights are good and the bulbs are brand new. My headlights / fog / tail lights and turn signals all work fine. The side marker lights just do not come on. I was told perhaps the relay may be shot, however there are 2 fuse boxes in the engine compartment and they are filled with various relays and fuses. Oh, I have check out all the fuses and they are also good.