Most likely you have a broken/loose wire i highly doubt theyd put them on the same fuse. check your fuse boxes, (under the hood and in the truck) if you cant find them look in your manual, you may need it anyway to see which fuse is which, anyways, check the fuses, if there all good, then you need to find a schematic of the wiring and follow the wires and check them wherever you can for power and ground.