The following wiring diagram illustrates how a single switch can power up the light and pull the chain for the fan. This ceiling fan wiring diagram is commonly used when there is no switch in the room where the fan/light will be located. It allows someone to draw power for the fan and the light from one connection to a nearby power source. Using such methods means that you would use the pull chains included with your fan to turn on the light and the fans. As the right-thumb rule, you can connect the white wires from your fan and ceiling together, connect the green wire to your household ground wire, connect the black wires, and connect the blue wires or the blue wire to the black wire for activating the light.