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Driver Window Stuck Down - 06 Cayenne S

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After earlier intermittent problems that seemed to be fixed for 5 months, the driver window is now stuck down.  When I had the trouble before, you could wait 10 minutes, and then it would come up fine for awhile.


I had tried the reprogramming route a few dozen times, but the problem always came back.  Finally took the door apart back in April, and the regulator was very stiff but appeared in otherwise excellent shape.  I worked lubrication into the cables and slides, and got it working very easy and smooth.  Back in and no issues until now.  It even travelled quite a bit easier than the other windows, so I would not think the regulator is faulty.


Neither the driver's switch or the key in the door lock will work, which would appear to rule out a switch problem?  All other windows work fine, and even when fully closed, make an audible motor effort if tried to close further.  The driver window does make that motor effort to go further down, but no noise when attempting to raise.  As noted before, the driver window stops 5/8" lower in the door than the passenger window.


Seems I must now replace the motor, although it is odd for a 12v motor to only work in one direction? Does the motor have logic built in which could be messed?


Any help is appreciated, as I don't want to just throw parts at it.




NOTE: Just went out and tried after 2 days sitting, and it went up like there was nothing wrong

Edited by Capt.Evan
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Have you tried changing the switches over from left to right?  If it's a faulty switch at least this might help you to find the problem before you take the door apart.  The driver's side switch takes more action than the passenger's side and will fail earlier.   


I had a similar problem last year.  My son's Merc Sprinter driver's window would not activate, but the passenger side was OK. Fuses were OK, so I changed the switches over side to side and it worked. As I then knew what the problem was I dismantled the faulty switch to find that the contacts were dirty. I cleaned them up and now it works OK.  


Hope this helps.

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Thanks for that suggestion.  The connector will likely not match up, as it only has one switch and the driver side connects 4 to the wiring harness, but I could try..


I am trying to imagine a wiring diagram where the key-in-the-door-lock window feature would run through the interior switch, where if one went bad, so would the other. 


It started working again today, with one brief failure, but it is just a matter of time.  If the brains are in the motor assembly, that is likely the culprit.


Just need to fix it before the wife gets in line at the carwash on a forthcoming cold winter day. :censored:



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  • 7 months later...

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