Most 4 way switch wiring is placed between the wiring of two 3 way switches. The most basic three way switch setup has two switches that connect and control one light fixture like switches on either end of a.

I Am Trying To Wire In A 4 Way Switch System To Replace 3
Replace 4 way switch with 3 way. Remove the cover plate from the switch box with a slotted screwdriver. The electrical wiring adds additional wiring to the same principles of 3 way switching. 4 way switches are a convenient way to operate lighting fixtures from three or more locations. If a light switch fails to function you should replace it. How to replace your old outdated 3 way light switches. If the box will remain permanently accessible and with a blank cover plate then all you need to do is connect the common wire on the 3 way to either one of the travelers cap off the other traveler and leave the 4 way switch alone.
Unscrew the three way switch you suspect isnt operating properly from the box. Install a 4 way occupancy sensor to replace the existing 4 way switch. 4 way switch wiring. These 3 way occupancy sensor switches may replace the existing 3 way switches. If the switch doesnt have the words on and off embossed on its body and its the center switch of three switches that control a single light or receptacle its a four way switch. Before disconnecting the switch wires label each wire for easy reattachment later and mark the hot white wire with a black marker.
To replace a four way switch follow these steps. Fully explained 4 way switch diagrams. Turn off the. The sensing pattern should be adjusted as wide as possible and the time delay should be adjusted to provide enough time to travel the full distance of the stairway.