3 speed switch wiring schmatic
On a 3 speed switch you usually have 4 terminals, and they are marked L1, 1, 2 and 3.
L1 which is line voltage from the electrical cord or wall plug, #1 low speed usually a red wire from motor, #2 medium speed usually a blue wire from the motor and #3 high speed usually a black wire from the motor. That is if the fan is low,medium and high, if it says high, medium and low then reverse #1, #2 and #3
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