Dialog 4 Handwheel Schematics/Information

I swapped out old switches from the handwheel because it was not lighting up keys properly and switch behavior was not predictable.

Before the change X-switch didn't light at all (even with a new bulb), Y-switch was lit all the time and only Z-, 10- and 100- switches lit when pressed. After the change both X and Y are lit all the time.

Any ideas where the fault might be?