Can you run 12 volts DC thru a 6 volt DC, 2 or 3 speed resistor switch?
Picture of 2 & 3 speed switches resistor on back of switch.
When the HIGH position is selected resistor is not in the circuit.
When the MEDIUM or LOW positions are selected resistor is in the circuit.
3 Speed Switch Photo Album 3 speed switch taps the resistor twice for 2 different resistances.