1989 930 power window problem

[WCBUD25]

Hello, I have a 1989 930 and my drivers side window button would stick in the down or up position - no big problem I would just remember to cancel it when the window finished. However I let a friend use the car and he did not quite figure that out and left the button in the UP position. The window now stays in the up position and the switch will do nothing. The passenger side worked fine from both switches.

So the other day I put a new switch in the drivers window and it did NOT solve the problem. So then I pulled the door panel off and inspected all the wiring but did NOT open the visquene seal on the door to get to the motor. Instead I checked the circuits on the switches and the operation of the switches with a VOM and everything checks out fine. For kicks I decided to turn the ignition switch on and test the pass window - IT DID NOT WORK! Neither switch now worked for anything. So I did some additional digging and found that the Turbo has a Window Relay under the dash behind the gauges - I replaced that today and still nothing.

I guess my first question is since I have removed the door panel and had to disconnect the alarm flasher and some kind of box screwed to the door panel by the arm rest, did that somehow interupt my window circuit?

This has really got me puzzled and I really don't know what the next question should be. I really don't want to break into the visquene to test the motor for two reasons 1) it would be just too odd that all of a sudden BOTH driver and passenger motors died 2) with a car like this I am trying to leave everything as pristine as possible.

I am open and ready for the ideas and I will thank everyone who responde in advance for taking the time to give it a shot.
Best regards, eric

[slodave]

Did you check the fuse?

[WCBUD25]

Yes, I traced everything with a VOM and all have great power and ground. Thanks, eric

[Greg930]

I think it may be jammed, try loosening the window frame to releave the preasure. The mechanism is kind of a scissor slide motion, the glass has a channel rail on the bottom that 2 rollers go in, so it's not a toothed gear like you would think. You will have to get in behind moisture barrier to loosen the frame work on the center style that goes in to the door. Once it is loose tap the window switch down, the window should move a little, tighten bolts, and then run window down all the way. I got some new window switches that did the same thing, had to file the rectangular holes a bit, seems the new switches are a bit larger then original equipment. Those little boxes in your armrest I believe go to your speakers.Good Luck

[Mysterytrain]

First off I would test the motor out of the circuit. Secondly, you mention disabling the alarm, that might be why both windows are not working at this point. The alarm is removing the power or the ground connection to the motors. I posted a drawing awhile back showing how the switches worked and how the circuit was laid out. My bet is the ground.
Power Window Switch schematic
Additional, some later cars have 2 relays on the power window circuit. One for switching the power and another as a convinence circuit that allows the windows to operate with the ignition off when you open the door.

[Greg930]

Mysterytrain is correct, I guess I overlooked what you wrote in re: to the alarm

[WCBUD25]

Thanks to Greg and Mystery. If I just look at the probability of this thing I have to say, well BOTH windows could not have stuck at the same exact time I have to be reasonable here. Now what Mystery said about the alarm system disabling the lock system - I will go home tonight and plug my door panels back in. That makes sense because as soon as I took the door apart .... the pass window quite. Also, Mystery I did use your drawings to confirm the circuit. Those drawings are nothing short of great and brought me good peace of mind.

Best regards, eric

[john walker's workshop]

the middle two wires on all the switches alternate positive/negative to make the window motor change direction. they go directly to the motor. pull those two wires off whatever switch/motor you want to test and use two jumper wires from power and ground to try to get the motor to do something.

[WCBUD25]

Great advise. I did notice that from the drawing and never thought to jump it there. Will do that tonight. Thanks again - great advise!! eric

[WCBUD25]

Ya' know, when I read some of the stuff in the different threads and some of the suggestions on my post - I really thought for a moment that you guys were burnin something more than just the midnight oil!! But your wisdom and experience precedes you. Everyone here was right!!!! Even the guy on the other thread that said ".......hit it with a well placed hammer"

I hit it with a well positioned hammer and touched the wires with power as John suggested and BINGO the window rolled down. Apparently just as Greg predicted the widow was STUCK. My most HUMBLE apologies to you GREG. I had to get this post down so I could thank you all for the input and now I will dolly out to the garage and tinker with putting the car back together.

I hit the door panel with a mallet and whammo!

I can't believe it. Some engineer is rolling in his grave right now saying......" I got another one!! """

Thanks again all,
eric
:-)))

[john walker's workshop]

coupes don't stick as much as targas do for some reason.

[Mysterytrain]

This sure is a pretty cool place when you think about it!

[WCBUD25]

Man you said it MysteryTrain. This is a cool place for sure. Again a big thanks to MysteryTrain, Greg930, JohnWalker and SloDave for your helpful thougthts and action. I hope I can return the favor some day soon. BTY, I sell high end race car trailers and haulers from simple enclosed to customized monster stackers and Freightliner/Haulmark motorhomes and coaches - if any of you folks that helped me ever think there is anything I can help you out with - just PM me and ID yourself to this window problem. If I cannot get it for you I will help find it but we are pretty well known for our custom rigs and have over 100 units in stock at any one time. Let me know!

Best regards,
eric

......the switch make is go UP and the switch makes it go DOWN all with just the touch of a button....... WOW!

[Greg930]

The one thing I like the most about pelican, is all the input you get from so many knowledgable people, and most every one is right, just different circumstances but all relateable. I have learned so much from listening to everyones input when I have needed help. Lots of good people here.