As per the service manual: 13V between red and white at the motor connector from the pcb.
Did not "check voltage at J2-3 white wire and J2-4 yellow wire.More than 8 vdc?" as the serv man was not avail to me at that time.
Red to white resistance @ 2.2k and Yellow and white open. So the motor has resistance.
Motor in hand - disconnected form the unit - jumpered red and yellow together to 12dc+ and white to 12dv-: motor does not run.
Am I missing something?