I moved wires last night but always kept the red wires at the top and the black wires on the bottom. That is the way the old switch was wired. The light works, but does not work correctly when flipping the other 3 way switches.
For example, when I sit at the 4 way and operate the foyer light, it works. When the 3 way at the top of the stairs is flipped, the 4 way no longer controls the light. Same for the 3 way in the foyer. So the 4 way works part of the time.
I don't want to change the 3 ways because they are connected correctly; for the last 19 years they have worked. So I know that it is just getting the 4 way wired so that the foyer light works at all the stations.
Here is how the switch stands now. 1 and 2 are on the top and 3 and 4 are on the bottom. Reds are on 1 and 2, blacks on 3 and 4. I switched sides on both the red and black, but if I correctly understand what I read on the Internet, it makes no difference which direction the current flows as long as the 4 way switch can make the X.
So if I get you right, Joe, I can place a red on 1 and a red on 3. Then a black on 2 and a black on 4. If that doesn't work, then switch to the opposite poles.
I'll wait for your advice before making the switch.