Wiring 3 Way and 4 Way Switches with Multiple Lights A 4 way switch must be wired between two 3 way switches as shown in the diagrams on this page. A 4 way switch has five terminals: one ground and 4 circuit terminals divided into two matching pairs called travelers. Each pair of traveler terminals should be wired to the traveler wires from one of the 3 way switches in the circuit. 4 Way Switch Wiring - Easy 4 way switch wiring comes in real handy when you would like to control a light fixture from more than two locations. While wiring a 3 way switch is good enough for a staircase or hallway, wiring a four way switch is crucial for the addition of a third, forth or more switches.