Adding a Light Fixture to a 3 Way Switch
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3 Way Switch Wiring Diagrams: There are wiring modifications which would allow you to accomplish what you are trying to do, however the specific 3-way switch method that you now have must be identified.
© By: Dave Rongey
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Light Fixtures and 3 Way Switch Diagrams
[ad#block]Electrical Question: I have added an additional light (sconce) to a three way switch.
- I have “scabbed” the neutral (white) from a near by outlet because there isn’t a neutral (white) wire in the switch box. I tried to wire nut the new light to either leg (red or black) and if it is connected to the black leg the switch that is “local” can turn the light off, but the other switch cannot and vise versa happens when I connect to the red side.
- Do I need a different switch?
This electrical wiring question came from: Tom, a Homeowner from Gretna, NE
Dave’s Reply:
Thanks for your electrical wiring question Tom.
3 Way Switch Wiring Diagrams
- A neutral wire should never be “scabbed” or used with another circuit as this question describes.
- This practice may result in a dangerous condition.
- There are wiring modifications which would allow you to accomplish what you are trying to do, however the specific 3-way switch method that you now have must be identified.
- I have prepared an extensive guide which will help you with your 3-way switches and light fixture wiring.
The Following will assist you with 3 Way Switch Wiring Diagrams

3 Way Switch Diagram

3 Way Switch Diagram
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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