Locate a convenient pace to mount the switch. How to wire an onoff switch for an auto cool fan step 1.

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How to wire electric fans to a switch. Turn the power back on and test the fan. Locate a 12 volt power source by using the multimeter. Connect white wires together. A relay kit our part number ccfkrl will include everything you need to properly wire up your electric cooling fans with the exception of additional wiring needed to complete all of the circuits. Connect black wires together. Connect the lighting wire typically blue to the black fan wire and the black ceiling wire.
Tuck the wires back into the box. The first part of the installation is to install the electric fan to your radiator and remove the mechanical fan. A good source close to the switch is the cigarette. You can do this in the switch box or by running a length of wire through the wall or attic. Connect the greencopper wires together. Electric wiring to ceiling fan box preparing to mount the ceiling fan boxwire into the ceiling fan box through a wire bushing attaching the ground wire mounting the cradle bracket the ceiling fan wires are connected close the canopy attach the fan blades and wiring a double stack switchinstalling double stack switch and explain how to connect the ceiling fan.
To wire an exhaust fan and light fixture to a single switch you have to find a way of connecting the fan and light. The operation involves making pigtails so its a good idea to know how to do that. A good place is somewhere out of the way but still within reach.