Re: windshield wipers

Posted by HH56 On 2014/11/23 21:02:26

One other thing you can do is run the motor and watch as it stops. Push the little rectangular bar a bit more in the same direction. It could be the motor is tired or worn at the critical spot and just can't make it far enough to reverse the valve. It is also conceivable someone has greased the motor and there is a big blob of grease on one side of the paddle keeping it from moving far enough.

If it still doesn't reverse, I would take the wiper motor off and play with it with no load. Disconnect the hose and cable, then Just two screws and it lifts off the cable parts. That way you can manually turn the little rectangular bar on the motor and watch or listen for the valve to change. If rotating so the blades would rise, you should be able to hear a snap when the paddle gets almost to the max rotation. After the snap, reverse the motion and turn the paddle back toward park to hear another snap as it gets near the bottom. If you don't hear anything then something is suspect. If it does snap, hook up the vacuum and hold the motor in your hand with no load and see what happens.