How to Wire a 4 Way Switch

Wiring a 4-way light switch may look intimidating in the beginning. However, if you follow the correct steps, double-check all the connections, and use the proper tools and equipment, you can accomplish the job quickly. A 4-way switch allows you the ability to turn on and off a fixture at multiple locations. This might include another room, or even in the garage.

Difficulty: Moderate

Instructions

Things You'll Need:

• Two 3-way Switches 4-way Switch 3-wire Cable Screwdriver Electric Tape

4-way Switch Wiring

1. Connect at the light the power source white wire to the light fixture white wire. Connect the black power source wire to the white wire going to the 3-way switch 1. Code the white wire at both ends (use tape to show it is a hot wire). Connect the black light wire to the black wire going to 3-way switch 1.

2. Connect, at 3-way switch 1, the black wire from the light fixture to the black wire to the 4-way switch. Connect the white wire coded for hot to the bottom screw (dark screw). Connect the red wire (from the 4-way switch) to the single screw (light-colored). Connect the white wire (from the 4-way switch) to the screw opposite the red wire (light-colored screw).

3. Connect at the 4-way switch the red wire from 3-way switch 1 to the bottom left screw. Connect the white wire from 3-way switch 1 to the bottom right screw. Connect the black wire from 3-way switch 1 to the black wire from 3-way switch 2. Connect the red wire from 3-way switch 2 to the upper left screw. Connect the white wire from 3-way switch 2 to the upper right screw.

4. Connect at 3-way switch 2 the white wire to the bottom screw (side with two screws, and light-colored screw). Connect the black wire to the top screw (side with two screws, and dark-colored screw). Connect the red wire to the single screw on the side (light-colored screw).

Tips & Warnings

• Double-check the diagram and steps before buttoning up the boxes.
• Always use caution when working with electricity.

References

• 4 way lights