Add A 3 Way Light Switch. Three-way light switches control a light from two locations, such as from both ends of a staircase or hallway. Three-way wall switches control a light fixture from two locations in a room.
Understanding how the circuit works satisfies Any number of four-way switches may be added between two three-way switches. Since we know the common terminal is going to be one of two things—either the feed to the light or the power source to feed the setup—and we've got our light feed on this end, the light feed is. Wiring Three Way Switches - When adding additional lighting to an existing three way switch configuration, the only place the additional lights may be wired to are at the existing light fixture or to the switch box.
Since we know the common terminal is going to be one of two things—either the feed to the light or the power source to feed the setup—and we've got our light feed on this end, the light feed is.
Slide your mouse over it to see it change state (requires Javascript enabled): Here is a typical circuit in its four possible states.
Wiring Three Way Switches - When adding additional lighting to an existing three way switch configuration, the only place the additional lights may be wired to are at the existing light fixture or to the switch box. Controlling a light with three or more switches. The problem is I am not sure this is possible.