no power to ballast resistor

Are you getting power to the voltage regulator on the blue wire. If not I would check where it goes into the bulkhead connector and see if you are getting power there. If not there check it on the inside of the connector by unplugging in and checking the same terminal. If no power there then go to the switch and check the blue wire there. If no power there then bad switch. any where else it is a bad wire or connection.

Jason