If you treid 3 switches, then it probably isn't the switch. I would have stopped swap;ping switches after the first one. If you swapped one part for another and get the same results, that usually means the part you swapped isn't the problem. Swapping more parts won't help. You need to test the parts in the rest of the system.
What weekender was asking is did you test the light to see if it lights? I would test by hooking a jumper wire from battery positive to the hot lead at the front and rear signal. This will test the bulb, socket and ground for each signal light.
If the lights light up then the problem is between the light and the flasher switch.
If they don't light up then the problem is with the light it self. A bad wire, bad socket, bad bulb or a bad ground.
You also don't mention what year your bike is. The earlier years didn't have the self canceler and were simplier. A basic turn signal circuit is power goes to the flasher on a brown wire, from the flasher to the left/right switch on a brown/white wire. Power then flows out to each side , right on the dark green, left on the chocolate.
If your left works ok then you need to trace dark green wire from the switch to signals.
Leo