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97 Boxster Windows Open Intermittently On Their Own -Past the Stop

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97 boxster, 5 speed, 2.5, 37,000 miles

Four times now in the past two years, on longer drives, the windows on both sides drop without prompting, to different levels, to and below the automatic drop point, eventually all the way down. I first thought it was my late father, prior Porsche owner, playing a trick, but I'm beginning to think it might actually be electrical..... They'll go back up when I use the switch, but then they start down again, sometimes almost immediately, other times after a few seconds or minutes. If one side starts, I can expect the other side to start. They'll drop some distance, not always exactly the same, then they'll drop again, then all the way, sometimes they drop and stay for a while. They never go back up on their own.

First time it was after 20 minutes of driving, second time it was 2-3 hours into the drive, third time 3 hours into the drive. Spent the last hour sending them back up only to have them start down again.

I've read the post from 2005 about window action http://www.renntech.org/forums/index.php?s...lectric+windows and wonder if my problem is related. This has never happened while the car is parked, only driving.


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  • 7 years later...

The problem is the switch where the top latches to the head rail (where the top's hook drops into the depression and latched). Mine did exactly the same thing and I replaced the switch and it was immediately fixed. When the car is moving, the slight movement of the top causes the switch to think that the top is being put down.

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When it happened to me, I was driving and thinking of my late Dad who bought a '74 911 Targa (that we still have) and showed me the wonders of Porsche. I gave a bit of a "nod" to him in his memory and very soon after, the windows started moving......Until It became more persistent, I enjoyed thinking that Dad was lowering the windows for me as a sign of his awareness of my thoughts. Then my mechanic set me straight.....


Best to you, from California.

We loved Germany, floating the Danube from Vienna to Nuremberg at Chistmas time.

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You did a very nice trip...... to travel on the Danube ( Donau ) is excellent.

I did it vercevisa from Regensburg to Vienna by bicicle.


I am sorry, never been to California but five weeks in Alaska. Also very very nice.


Best regards




PS why your nick is Srseaman ? you are boating ?

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Problem solved.....

I checked the switch on the windscreen frame but also when i removed the cable from the switch the windows opend.

So i removed the top black box and opend it during i opend the box i saw a little corrosion on the tongue no. 24 ( contact )

I cleaned the contact and put the box back in place

...... and it works as new.....


Interesting, just the Contact 24 has this problem the others are free from corrosion. No water signs seen, the Boxster is only with nice weather in use and always in a dry garage.



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