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 Usb Cable Pinout Diagram240v Wire Color CodeCable Between Switches240 Volt Wire Color CodeHome Electrical Wire Size Chart7 Pin Trailer Wiring TroubleshootingHoneywell 5 Wire ThermostatHouse Electrical Wiring Troubleshooting