I would check to make sure your power fuses are not blown,i have seen a fuse look and test/ohm good but once it gets some current running thru it it goes dead.....also check the condition of your cables to make sure there are no bare spots that are shorting to frame when the motor is trying to run. Especially check you A1 and A2 cables from the Right traction amplifier to the motor(code 65R) Check the continuity of the motor windings in the right motor,check for an open winding condition