And just in case you ever wondered what was going on inside an old-school flasher that made
that distinct clicking sound while interrupting the circuit, this is a pretty neat video including slo-mo:
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And if this piqued your curiosity, in the same FSM there's wiring diagrams
that show how the headlamp switch + the turn signals + the emergency flashers
are all interconnected. Strange but true. (At least there isn't a half-dozen standalone
ECUs talking to each other over a CAN bus in order to provide this functionality. :0)
FWIW --