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I have the problem where:
o Wipers don't park correctly
o stalk pull doesn't cause wipers to go
o washers don't spray (because no voltage at washer motor)
I took out the wiper assembly (linkage and motor). It's easy to do. Wiper caps pop off, then bolt is unscrewed and wiper arms are pulled off. Remove four more bolts and assembly comes out.
On the bottom of the big metal thing that the motor goes into there is a plastic plate that is riveted on. One of the rivets has a little "-" minus sign next to it. When the wiper arms are in the bottom most position, this rivet is shorted to the brown wire, causing current to flow in the brown wire. This is how the car knows when to stop the motor in the right place.
I hacksawed the plastic and discovered that the minus rivet had corroded all the way through. So, it was no longer grounded by the metal of the linkage.
Here's what you should do:
Use a ohm meter to measure the resistance between the linkage metal and the rivet. There should be zero resistance between them. Or, better yet, try to manually ground the rivet without taking anything apart. Fashion a carefully bent coat hanger that touches the rivet on one end and a good ground on the other. You won't be able to see the rivet, but you can figure out - it's the one closest to the windshield, on the underside of the big metal thing. If you can cause the wipers to work properly with this temporary ground, then you've got my problem possibly.
To fix this, drill out the rivet. There is a metal layer between the plastic and the big metal part. This metal layer is what needs to be grounded. I'm going to solder a wire in the drilled out hole then ground it somehow. As I think about it, it might be easier to force the new ground wire between the big metal thing and the plastic. Or, best yet, try to put a screw where the rivet was.
I hope you never need this information.
Jason
posted by 75.169.39...
, Wed, 17 Sep 2008 13:34:28, Mon, 22 Sep 2008 11:56:50
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