I should have mentioned that the actual numbers appear on the male side of the Y-connector, Peter. Looking at it the female end the way you are -- that is, with the row of 18 being on top -- they number 1 to 18 left-to-right across the top and 19 to 35 from left-to-right across the bottom.

Regarding the measurements, were you measuring resistance between the sockets on the female connector and a good chassis ground? Because according to what you reported, your controller is receiving no signals from any switches! And remember, you are only concerned with sockets 10 and 16-31.