I prefer the four position style switch, since they allow you to start the bike with the taillight off.
As someone else suggested try hotwiring the lights to the battery with the bike running. If it stays running its probably a bad ignition swtch. If you connect the wires that connect to the lights position on the switch to the negative battery terminal after the bike is running, its a pretty conclusive test.
As someone else suggested try hotwiring the lights to the battery with the bike running. If it stays running its probably a bad ignition swtch. If you connect the wires that connect to the lights position on the switch to the negative battery terminal after the bike is running, its a pretty conclusive test.