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4 Way Switch Wiring Diagrams
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How to Wire 4-Way Switches: Here are some fully explained 4 way switch diagrams. 4-way switches are a convenient way to operate lighting fixtures from three or more locations. |
Wiring a 4-Way Switch
[ad#block]Electrical Question: I have should have three switches that control the four can lights in the ceiling of my upstairs hallway.
- When I moved in only two of the switches were working and the third was not connected to the wires.
- The two black wires were connected with a wire nut and the two red wires were connected with a wire nut in the box.
- I purchased a 4-way switch to replace the unconnected switch.
- I cannot seem to get the wires connected to the 4-way switch so that all three switches control the lights at all times.
- No matter what I try there seems to be position that the switches get into that renders the other switches inoperable.
Background: Karen, a Homeowner from San Diego, CA
Dave’s Reply:
Thanks for your electrical wiring question Karen.
How to Wire 4-Way Switches
How to connect the wires 4-way switch wires so that all three switches control the lights at all time
4 Way Switch Wiring
4 Way Switch Wiring
- Fully explained 4 way switch diagrams. 4-way switches are a convenient way to operate lighting fixtures from three or more locations.
- The electrical wiring adds additional wiring to the same principles of 3-way switching.
The links below take you to full wiring diagrams with instructions that will help you identify the wiring method used in your home and assist you to wire your 4-way switch.
For more information about 4 Way Switch Wiring:
The Following links will assist you with 4-way switches
Light Switch Wiring
Wiring Diagrams
3 Way Switch Wiring Diagram, Helpful for Wiring 4-Way Switches which are wired with 3-Way Switches.
In response to the requests for this information, I have developed a comprehensive,step-by-step guide designed to walk you through the identification and wiring of your 3-way switches.
The following may also be helpful for you:
Electrical Wiring Video #2Home Electrical Wiring Videos about this Topic and MoreCheck out my YouTube Channel, and Subscribe! |
Dave's Companion Guide to Home Electrical Wiring:
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
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In your diagram of the 4 way switch, the wiring on my left 3 way switch is the same, but the right 3 way switch has the blacks on the same side and the red on the other. Will this matter?
FYI, I have the same wiring problem as Karen described.
Jerry,
As you may know, a 4-way switch is wired with or between two 3-way switches, and 3-way switches can be wired several ways, I have identified eight ways three ways switches can be wired depending on the application. The key to wiring 3-way switches and the four way switches, is to identify where the power source enters the switching circuit. This is described in the wiring diagrams, and I have prepared a helpful guide which explains this due to a lot of misunderstanding.
Dave