One problem that is easy to fix when you don't have power is the constant voltage plug-in area. With the plug removed the contact inside completes the power circuit for the switch to get power from middle rail of the track, so the little copper nail(looks like a nail) needs to make contact with the copper piece about an eighth of an inch wide by half inch long, that is an approximate measure.
That is why a post war ZW or Z will work with the 022 switches from another terminal like the B or C terminal when the track has power from the A or D terminal. The commons or U on the ZW are all hooked together inside the transformer.
Lee Fritz
