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Hi, my name is Kerry
Modern switches have an LED in them to indicate that the power is on. If you turn on a switch and it lights up, t means that power has gone through the switch.
The switch, on the other hand, could be connected to something or not connected to anything.
The best way to figure it out is to follow the wires, possibly using an ohmmeter.
If there is no wire connected to the output of the switch, the switch isn't connected to anything.
Ask questions if this confuses you.