Mia gives an overview of how turn signals work and then moves on to diagnostics. She explains how the wiring works. If none of the signals are working, then the problem is likely in this order:
* Fuse(s)
* Flasher
* Switch
* Wiring
If one or two signals are not working, then usually the bulb is the problem. Could be switch or bulb sockets or wiring but most likely is the bulbs.
Please feel free to share additional advise or what other common causes...
Why Don't My Turn Signals Work?
