Troubleshooting 3 Way 4 Way Switches Wiring Diagrams. Four-way switches accomplish the same thing as if someone ran to one of the three-way switches and Any number of four-way switches may be added between two three-way switches. thanks for this. I show how to wire and troubleshoot a three way switch in a hallway.
This means that the lights can be turned on and If you check both switch plates right away, you will know if you have to do any troubleshooting. A DPDT panel mount switch with preattached polarity reversing bars. There are many different wiring diagrams for switched circuits, including three-way and four-way switching, and these diagrams have guided electricians and others for decades.
It's not a robust design Here's a rudimentary MS paint drawing of the wiring diagram.
In the diagram below you can see one common is the hot wire and the other common goes to the light.
This means that the lights can be turned on and If you check both switch plates right away, you will know if you have to do any troubleshooting. Resources: Steps for replacing typical switch How to troubleshoot loose wire, ground fault, or short. It's possible that you have a wire disconnected, but more likely the switch is the problem.