When your turn signals don't work it can only be a few different items: switch, bulb or most often the 'flasher relay'. The silver round cannister is typically located in the engine bay. The switch sends voltage to the relay and it in turn modulates it off and on while sending it to the bulb. Most relays make an audible click while operating. They are so easy to replace there is no reason to ever not have them operating! This model of the flasher uses the push-on connectors.