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To troubleshoot and update old 3-way switch wiring in your home, start by turning off the power to the circuit at the breaker box. Then, identify the wires and terminals on the switches and make sure they are connected correctly. Consider replacing the switches with new ones if needed. Test the switches and wiring with a multimeter to ensure they are functioning properly. If necessary, consult a professional electrician for further assistance.

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4mo ago

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