Intermittent window problem

[cbonilla]

2003 Boxster S and I was hoping someone can guide me to an answer. I have checked the forums and I still can't decide whether the problem is the regulator (which I see if a common problem) or a microswitch (which I also see is a common problem).

 

Problem happens most often when I open the drivers door from inside. The window, rather than just dropping down an inch will continue to drop all or most of the way down.

 

Can anyone point me to a diagnostic procedure for this?

 

As I say it's an intermittent problem so I'm leaning to one of the microswitches. How many are there and where are they located? Does one replace just the microswitch or are they (it) part of a larger assembly?

 

Thanks in advance

 

Carlos

[Hilux2400]

There's a great tutorial in the 996 Common Fixes category:

 

http://www.renntech.org/forums/tutorials/article/217-door-microswitches/

 

It's worth being a contributing member to read these.

[cbonilla]

Thanks. I had read that tutorial. That you pointed me there leads me to think that you believe the problem is in the micro switch and not the regulator?

As I mentioned, this is an intermittent problem, though it has been getting more frequent. I hate intermittent problems as it almost forces you to simply start replacing parts Do you think there is any value in trying to clean these switches with contact cleaner? Is that even possible?

Carlos

[cbonilla]

More info now that I have focused on this issue

 

It also happens when I open the drivers door from the outside. And when I drop the top the drivers window drops down about half way rather than just an inch. When it happens i can't stop the downward travel with the window buttons and have to wait for it to go all the way down for it to respond to the window switch. And when it does respond the window only goes up if I hold the switch -- no auto up

 

Any thoughts on debugging which microswitch is responsible for this?

 

Carlos

Edited June 15, 2015 by cbonilla

[Hilux2400]

Have you been through the window re-learning process?  When you unlock the car with the remote and keep the button pressed down do both windows drop down until you release the remote button? 

[cbonilla]

I have been through the re-learning process for the auto down function. And for my vintage the windows don't work the way you describe (holding the remote button)

Hate to think what the dealership will charge for this

Thanks, any and all ideas welcome

Carlos