by Hans Efde » Wed May 02, 2012 10:39 pm
Then I suppose the motor switching is faulty. Or it was removed from the assembly (that must be done because the bracket needs to be modified, see the build manual), but when it was installed again, the arms were in the wrong position. The zero position of the motor does not correspond to the zero position of the wiper arms assembly.
My idea would be to disconnect the motor spindle, put it on and off and reinstall in the wiper assembly again (making sure it's in the right position). Or else just buy another one. Rover 100 wiper motors fit as well if you can't find a Metro motor.