not sure what you are saying? do you have a "S" or a S+ machine? does the handle work? and not the spin button? the handle and spin button are in parallel, both use the same ground applied to two switches, both outputs from those switches are input to the cpu board. So if one works and the other doesn't, then you are missing the ground to the spin switch or the switch is miswired. The ground should go to the common terminal of the switch, the output wire is on the normally open terminal, there is no wire on the normally closed terminal.
Hope this helps
Jim