3 Way Switch Internal Wiring Diagram. They are always installed in pairs and use special wiring connections. Intermediate switch An intermediate switch is a three way light switch.
As the fastest growing demand of circuit and wiring diagram for automotive and electronics on internet based on different uses such as electronic hobbyists, students, technicians and engineers. Three-way wall switches control a light fixture from two locations in a room. ALWAYS photograph switch wiring before removing old switch, so mapping to new switch is easier.
In these cases, you can test the internal functionality with a simple procedure.
Use this technique to identify Hot wire.
Don't disconnect old switch before you are certain about the wiring. Pro-Tip: On a single-switch, the hot wires and interchangeable so use a voltmeter to determine which hot wire is supplying power. It's possible that you have a wire disconnected, but more likely the switch is the problem.