ok heres the deal
very commonly, the pcb blows on these
sometimes, the lock does it.. other time the motor brushes can cause this, because theyre both on the same plug
best bet is to visibly inspect the pcb, if it is blown, follow the wires back to the faulty component and test
experience would suggest that since it stopped during a wash, the brushes will indeed be chief suspect
hope this helps?
oh, and take the plug out