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

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

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

+1 on the Renntech article. Read closely to match your symptoms to their best guess as to cause.

Thanks... Looks like it's most likely the micro-switch.

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