How To Fix A Three Way Switch. Virtually every house has at least one set of three way switches. Two wires attach to brass screw terminals.
It isn't uncommon either to have one three-way switch in the same box as two or even three others. Often they can be found at either end of a hallway. Most of the problems with these switches result from a miswired switch.
Most of the problems with these switches result from a miswired switch.
There are many ways that a three-way switch can be wired, but usually power or the light fixture connect to the load side of the switch and traveler wires run between traveler screws on both switches.
A three-way switch has three terminals, and the switch connects the first terminal to either the second or the third terminal, as shown here If you are trying to understand how a set of switches are wired in your house, using an ohmmeter or a continuity detector is the only way to reverse-engineer what. They may be at the bottom and the top of stairways. You may also need to cut additional breakers if either or both of the.