The motor has not been completely isolated yet, a faulty timer can also cause selection of two motor windings at the same time. Unplug the motor connector, on the motor, unplug the white/violet and white/orange wires, move them aside making sure they are not touching each other or anything else (tape them if need be), plug motor connector back in and try again using the jumper across the speed switch connectors. If you still have the problem, one other possibility is that the contacts in the motor centrifugal switch for the start winding are not opening when the motor gets up to speed. I know you checked that switch before and also confirmed the motor would operate in a lower speed so it appears the switch is working properly but there is a way to check it for sure.
Last edited by fairbank56 : 05-10-2013 at 05:53 AM.