If so how do they work?
The flasher is a common automotive part. It provides the blink....blink....
It is always doing it's thing....blink.....blink....
But the switch, when off, isolates the flasher from your turn signals, so they work like they always did.
When the switch is on, the flasher is now connected to your signals, so they blink...blink...
Hope that helps, I did this on the fly, if not let me know and I'll put more thought into it and try again.
But it does work.