4 Way Stop Diagram. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wirenut. They all must be between the two 3 way switches.
This 4 way switch diagram 1 shows the power source starting at the left 3 way switch. You ll want to pay attention and take notice if there are any other. A 4 way switch is always placed in between two 3 way switches.
If you understand how to wire a 3 way switch you ll have no issues with a 4 way switch.
This 4 way switch diagram 2 shows the power source starting at the fixture. It is important to understand how these switches are wired before attempting to troubleshoot or replace. 4 way switch configurations are used to control lights with three or more switches a 3 way switch is used on each end with one or more 4 way switches in between the two 3 way switches they do not have an on off position like single pole switches. A 4 way switch wiring diagram is the clearest and easiest way to wire that pesky 4 way switch.
