How do I wire my 4 way switch?
Unhook all 4 conductors.

Identify 2 conductors that are in the same cable.  Necessarily, one will be white and the other red.   This pair will be a pair of travelers.

While we're here, it's illegal to use a white wire this way without marking it with black or a color. Also, nothing tells you that this white is associated with that red.  I suggest marking both the red wire and the white wire with electrical tape of the same color, e.g. yellow.  You can mark them the same color because both wires do the same thing and are interchangeable.

Anyway, these two travelers go on the Brass terminals of the switch.

One pair of travelers will remain, also white and red.

Same thing, mark them so the white is tagged a color and also to associate them with each other.

This set of travelers goes on the Black terminals.


How did I know? I just know how 3-way/4-way circuits work.