3 Way Wall Switch May 28, 2019 Understanding Three. Three-way wall switches are most commonly used to control a light fixture from two locations, such as from both ends of a hallway or stairway. www.thespruce.com Hot Ground Wire3 Plug To 4 Plug Dryer AdapterBmw R75 5 Wiring DiagramJohn Deere X320 Wiring DiagramTrailer Power ConnectorCar Stereo Installation Wiring DiagramHow To Wire A House For CableReplacing Old Thermostat Only 2 Wires