If you had all the motor and wiper arms off they need to be reset/ timed up the motor has to be aligned up on the cam arm in park. Set the motor and linkage up in the car position. Then put your wiper arms on. It's quite simple to do you just need to disconnect ever thing. Turn the wiper motor on, and make sure it's turned off in park. Then fit linkage on in the park position. Then fit the wiper arms in the park position.