Three Way Switch Definition March 4, 2019 Understanding Three. Three-way wall switches control a light fixture from two locations in a room. They are always installed in pairs and use special wiring connections. www.thespruce.com 6 3 WireRed Black White GreenNeutral Ground WireRoom Thermostat Wiring DiagramFive Wire ThermostatOld Light Switch To New2 Gauge Copper WireYamaha Blaster Headlight Wiring Diagram
