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.
© By: Dave Rongey
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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 Diagram

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:
A Complete Guide to Home Electrical Wiring
Be sure to get your copy of my BIG Book:
Perfect for Homeowners, Students and Electricians
Includes:
Home Electrical Wiring - Room by Room
120 Volt Circuits
240 Volt Circuits
Multi-Wired Circuits
Wiring Methods for Installing Home Electrical Circuit Wiring
Electrical Codes for Home Electrical Wiring
....and much more.
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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.
Electrical Tips to Help You Wire it Right
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The Safest Way to Test Electrical Devices and Identify Electric Wires!
The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
The Quickest Way to Check for Faulty Electrical Wiring!
The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets
Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency
Lights indicate if wiring is correct and indicator light chart is included
Tests standard 3-wire outlets
UL Listed
Light indicates if wiring is incorrect
Very handy and easy to use.
Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!
The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..
The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.
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Electrical Parts to Help You Wire it Right
Switches Parts and Accessories
Light Switch Single Pole
3 Way Light Switch
4 Way Light Switch
Switch and Outlet Combo
Dimmer Switch
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Wiring Four Way Switches
[ad#block]Electrical Question: I am struggling with the wiring for a single light that has four light switches.
- I can’t seem to get the circuit wiring connected right
- The first three switches work but I can’t get the fourth switch to work.
- Can you help me out with the wiring?
- Some 4 way switch wiring diagrams would be very helpful.
Background: Jeremy, a Handyman from Belleville, PA.
Thanks for your Electrical Wiring question Jeremy.
Electrical Answer:
Jeremy, I have provided the following links that lead to fully detailed information on this website that will assist you with your electrical question.
Wiring Diagrams for 4Way Switches
Application: 4-Way Light Switches.
Skill Level: Beginner to Intermediate.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience and ability to work with tools.
Precaution: Identify the lighting circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional 3-way or 4-way switch wiring should be done according to local and national electrical codes with a permit and be inspected.
How to Wire 4-Way Light Switches
4-Way Switch Wiring Diagrams
- Note about 4way Switch Diagrams:
- To illustrate the 4 way switch wiring, Switch boxes and Fixture boxes are not shown but are obviously required for every application.
- These diagrams are shown as using the Type NM cable wiring method.
- The Type NM cables contain a ground conductor which is required for all applications as well.
- The ground conductors are always bonded together to insure the integrity of the ground path.
- If you are using metal boxes, the ground conductor must be attached to each box by using a threaded ground screw or provided attachment.
- The frames of the switches which have a ground screw are to be attached to the ground conductor as required.
You identified your project to be about 4 Way Switch Wiring, so you might find this information useful:
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.
Wiring Four Way Switches
[ad#block]Electrical Question: I am struggling with the wiring for a single light that has four light switches.
- I can’t seem to get the circuit wiring connected right
- The first three switches work but I can’t get the fourth switch to work.
- Can you help me out with the wiring?
- Some 4 way switch wiring diagrams would be very helpful.
Background: Jeremy, a Handyman from Belleville, PA.
Thanks for your Electrical Wiring question Jeremy.
Electrical Answer:
Jeremy, I have provided the following links that lead to fully detailed information on this website that will assist you with your electrical question.
Wiring Diagrams for 4Way Switches
Application: 4-Way Light Switches.
Skill Level: Beginner to Intermediate.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience and ability to work with tools.
Precaution: Identify the lighting circuit, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional 3-way or 4-way switch wiring should be done according to local and national electrical codes with a permit and be inspected.
How to Wire 4-Way Light Switches
4-Way Switch Wiring Diagrams
- Note about 4way Switch Diagrams:
- To illustrate the 4 way switch wiring, Switch boxes and Fixture boxes are not shown but are obviously required for every application.
- These diagrams are shown as using the Type NM cable wiring method.
- The Type NM cables contain a ground conductor which is required for all applications as well.
- The ground conductors are always bonded together to insure the integrity of the ground path.
- If you are using metal boxes, the ground conductor must be attached to each box by using a threaded ground screw or provided attachment.
- The frames of the switches which have a ground screw are to be attached to the ground conductor as required.
You identified your project to be about 4 Way Switch Wiring, so you might find this information useful:
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.
More about: Switch Smart Light Switch Wire Connections Humidity and Electrical Switches and Wire Splices The Key to 4 Way Switch Wiring Wiring a Up Down Switch for a Electric Projector Screen Fix Light Fixture and Switch Wiring Problems Wire a Switched Outlet to Control a Lamp Replacing a 3Way Switch with a Time Switch Wire a Disconnect Switch for a Tankless Water Heater
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