Deve,
I am not sure what you mean by "put the reducer before the switch". The reducer could go anywhere in the circuit.
Are you using conventional electron current flow terminology(arbitrary direction was selected when electricity first understood) or electron theory current flow terminology? Remember, according to electron theory, the electrons actually flow from the negative terminal of the battery to the positive, which means in our Chevys, with negative ground, the electrons actually are flowing from ground, through the accessory and then into the wires back to the positive terminal of the battery.
If I understand you correctly, if you are trying to "protect" the switch, then you would put the reducer between the motor and the switch.
In truth, the reducer just needs to be somewhere in the circuit, doesn't matter where. Perhaps I have misunderstood you.
Regards,
Kent
