Four Way Switch Light Wiring Diagrams. No matter all of other connected switches are at off or on positions. A recent update to the national electrical code nfpa 70 2020 in article 31427c now requires that all ceiling light electrical boxes in habitable rooms at likely ceiling fan locations be rated for.
After the trouble is fixed make sure the circuit works correctly. A dimmer switch can be used on any of these circuits but for two switches and above. From here the skies the limit.
3 way switch troubleshooting diagrams.
The common is for the live wire that supplies the input voltage to the switch. The key springs back from the starter position to the ignition position when released. Follow the switch manufacturers instructions and wiring diagram as the connections on the switch vary by manufacturer. 1 accessories 2 off 3 ignition 4 starter.