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Old 08-22-2013, 08:48 AM   #1
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How do I know what part I need?

I have the age-old Porsche window issue... My driver's side window goes all the way up, but then drops down a quarter of an inch and won't go back up to seal with the top.

I've heard that this can be the regulator or the micro-switch (and I believe there are several of these switches). My question is, how do I know which part is making my window have the issue?

I'd rather not (and can't afford) to replace all the parts if there is a way to narrow it down to the bad component.

Thanks
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Old 08-22-2013, 09:43 AM   #2
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Pelican has an write up on how to get to the switches. I'm not sure if they are normally open or closed circuits but you could probably jump the wires / unplug the switch to test.

Pelican Technical Article: Boxster Door Lock Mechanism / Boxster Door Handle - 986 / 987
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Old 08-22-2013, 11:06 AM   #3
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If the door latch microswitch thinks the door is open it will drop the window down. My passenger side has the reverse: It thinks the door is always closed, and do the while the window drops while I lift the handle, it goes back up as soon as I release. So I have to roll the window down a little in order to close.

I have the parts to fix; I just haven't gone in there yet to do it.

Renntech.org has a good write up:
http://www.renntech.org/forums/tutorials/article/217-door-microswitches/

I think you may have to register to read the tutorials.

Steve
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Old 08-22-2013, 12:22 PM   #4
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+1 on the Renntech article. Read closely to match your symptoms to their best guess as to cause.
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Old 08-22-2013, 12:36 PM   #5
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Thanks... Looks like it's most likely the micro-switch.

I just ordered from Pelican; we'll see how it goes.
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