First thing, get to the connector for the switch. Check that and make sure there are no issues. Mine was burnt and melted. If thats ok, you'll need to check for power to the switch and then power coming out when you pull the switch out. You can find a wiring diagram online. A google search should find one for you. I cant recall what website I got mine from. If you cant find any issues there, you may need to continue tracing the wiring down.