4 Way Electrical Switch Diagram February 27, 2019 Basic 4. The wiring of a basic 4-way switch is illustrated in this detailed wiring diagram. www.electrical-online.com Alarm System Wiring DiagramAc Relay Working PrincipleHow To Wire A Four Pin RelayNoma Thermostat InstructionsTrailer Flat Four WiringBasic Home Wiring CircuitsOn Off Switch ConnectionDefinition Of Relay Circuit