Hi, I had the same problem a couple of years ago. The motor is self adjusted, so if all joints are assembled correctly, continue according to this schedule: 1) deattach wipers 2) deattach the short linkage arm from the wiper motor shaft 3) run the wiper motor a whole wiper sequence 4) attach the short linkage arm, should point due left, to the wiper motor shaft 5) run the motor a whole wiper sequence and look at the wiper nuts that everything is going as it should 6) attach wipers 7) enjoy another rainy day :D I hope this will help you! Regards, /Ola