We have 2 '62's, a 300 Sport & a NY wagon. They both do the same thing in reference to the windshield wipers. When I turn them on, in either of the 2 speeds, they work great. When I go to turn them off, they keep going & I have to position the knob in between the off position & the slower speed position to get them to stop. How do I fix this? Do I need to pull the motor out its impossible location for some form of a repair? Thanks! Matt Allyn