enter image description hereI have two 3-way switches and one 4-way switch controlling multiple lights. When the 4-way is toggled up, one 3-way is toggled up and the other is down. These switches can turn the lights off and on (like 3-ways normally work). If the 4-way switch is toggled down then no switch will turn on the lights.

The 3-ways are both wired the same. Red wire on the bottom, black wire above that, and black wire coming from white wires wired together.

The 4-way is wired with one set of wires black on top black screw and red wire on top brass screw. The other set of wires black and red wires are wired the same on the bottom screws.

  • Can you show this in a diagram? Commented Sep 29, 2022 at 20:40
  • do not see how to add a diagram to the post
    – Brian M
    Commented Sep 29, 2022 at 20:47
  • Thank you Harper! Found the problem. All good now.
    – Brian M
    Commented Sep 29, 2022 at 21:23
  • 1
    Should accept Harper's answer if it helped you solved
    – Chris
    Commented Sep 30, 2022 at 0:14
  • @BrianM -- mind posting what you found as an answer? Commented Sep 30, 2022 at 1:29

1 Answer 1


Top or bottom means nothing on a 3-way or 4-way switch. What matters is the colors of the screws, or if they're not special, the markings.

I think you're assuming that switch manufacturers got together and made a standard for screw locations to make life easy for novices. Not the case at all. The screws are in random positions on every switch.

On the 3-way switch the travelers go on the brass screws.

On a 4-way, one cable of travelers go on brass, the other cable of travelers go on black screws.

enter image description here

One possible wiring diagram. The schematic is the same for all 3/4 way wiring diagrams.

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