Follow the directions. Now that the light switch is completely removed, we’ll need to prepare for the installation of the combo switch. Twist the wire connectors back onto the two sets of wires if you removed a light kit from your ceiling fan. The whites are normally just connected together with a wire nut and the coppers are connected together with a wire nut or grounded to a metal junction box. Below is a conventional wiring diagram for a 4-way switch configuration. Neutral: Standard switches do not require them, but the neutral wires will be present in the box. Wiring a three-way dimmer switch uses four wires and allows you the convenience of dimming the light from separate switches at opposite ends of a room. Step 1 Turn off the electrical power to the three-way dimmer switch by turning the dimmer circuit breaker to the … Before disconnecting the wires from the switch, label each wire with the provided labels. There are three types of wires that run to most switches: black wires that go to black or brass screws, copper or green ground wires attached to green or copper screws and neutral white wires. Pull the switch and attached wires out slightly, taking care not to damage any wiring. Unscrew the switch from the electrical box and pull it out with the wires still attached. Since the switch cuts the power on and off, there will be a black wire coming into the switch and a black wire leaving. In a double light switch setup, you will have multiple wires including one set each light fixture and … First of all we should connect the ground wires to the box. Insert the light kit or the switch housing cap into the bottom of the switch housing. With the power coming to the switch and then going to the lights, you will notice that there are two black wires, two white wires and two ground wires (bare wires). The other 4-wire bundle will enter the box from the top and have three colored wires (black, white, red) and a copper (bare) one. Normally when you replace a light switch, you would leave the neutral wires alone, but in this case, we’ll be connecting them to the new combo switch. If the light switch has a ground screw on it (usually green and at the bottom of the switch), connect it now. Disconnect the old switch by removing the screws. A wire that is bare, green, or yellow (or green with a yellow stripe) is the grounding wire, and the white wire is the neutral wire. (assuming it is a steel box). You’ll need access to the white neutral wires. To replace this kind of switch, follow these steps: Turn off the power to the switch at the main circuit breaker or fuse panel. Unscrew all wires. Load: Based on STEP 4, label the LOAD wire that did not test positive for voltage. So the new switch has four wires. 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