Wire A Ceiling Fan This diagram is for those who are replacing a light fixture with a ceiling fan. Your existing light fixture was controlled by a switch and only one switch. Chances are, you only have a 3-wire cable ran to the fixture so you would be limited to powering the ceiling fan Ceiling Fan Switch Wiring - Electrical 101 Switched lines and neutral connect to a 3-wire cable that travels to the light/fan outlet box in the ceiling. The fan control switch usually connects to the black wire and the light kit switch to the red wire of the 3-way cable. In this diagram, the black wire of the ceiling fan is for the fan, and the blue wire Wiring Diagrams for a Ceiling Fan and Light Kit - Do-it This wiring diagram illustrates the connections for a ceiling fan and light with two switches, a speed controller for the fan and a dimmer for the lights. The source is at the switches and the input of each is spliced to the black source wire with a wire nut. From the switches, 3-wire Ceiling Fan Wiring Diagram - Easy Take a closer look at a ceiling fan wiring diagram. Pick the diagram that is most like the scenario you are in and see if you can wire up your fan! This might seem intimidating, but it does not have to be. With these diagrams below it will take the guess work out. Need step by Ceiling Fan Speed Control Switch Wiring Diagram Ceiling fan capacitor connection diagram 3 wire ceiling fan capacitor diagram 5 wire ceiling fan capacitor diagram and installation Role of Capacitor in fan and single phase motor So in above diagram the speed switch contacts on L , 3 and 2.5 uF and fan on running or start on 2.5 micro farad Cap and on med speed.