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Vereeken's Avatar
 
Join Date: Mar 2004
Location: Belgium
Posts: 980
Rear window wiper motor need electrical help

My rear window wiper motor works but does not park. Can someone help me understand how it should work?

The connections on a 83 sc are at the motor

53 Black/red
31 brown
31 brown white
53a Red

So far all is good.

So why does it work but does not self park? I have cleaned the brushes and the copper. No joy. Fuse in engine is fine.

If I look at 53a it gets red (constant hot?) but the tab does not touch anything in the engine.

I am confused.


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My dad always found an excuse why not to buy a Porsche, so I guess I am all out of excuses.
Old 07-04-2012, 11:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
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Vereeken's Avatar
 
Join Date: Mar 2004
Location: Belgium
Posts: 980
I will answer my own post.

If your rear wiper does run but not self park even after you have checked all the wiring (at motor and switch) the small pin inside the motor is to blame.

When the motor runs it pushes every revolution a small pin up which makes or brakes the connection that is indicated in the photo.

In my case this pin was seized. I have drilled it out with a 3.2mm drill but a 3.1 would have been better. Anyway once that is done you will notice that the contacts open and close every revolution.

The little motor is very easy to dismantle. Apart from the seized pin it looked bright new after 30 years...

Michel

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My dad always found an excuse why not to buy a Porsche, so I guess I am all out of excuses.
Old 07-06-2012, 05:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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