4 WAY SWITCH WIRING DIAGRAM POWER SWITCH AT FIRST

How to Troubleshoot 4-way Switches - Electrical 101
Test a 4-Way SwitchTurn off power to the switches at the circuit breaker and using a tester, make sure power is off. Remove all of the switches so you can access the switch terminals. The wire connections do not have to be removed. Using a continuity tester, check continuity between terminals as shown. Actual toggle position can vary with make and model.
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