My lights wont turn on

Battery has a full charge and connections all good? If your talking about headlamps, here's the diagram. See the fuses, hot all the time. Have you checked voltage and ground anywhere? In the diagram, the top wire to head lamps is voltage, you can see the wire color. The bottom wire is ground, check them both, use a test light. Your headlamp switch is on the ground circuit for headlamps. If some other lights your talking about, have to be more specific.