Question about 1984 Porsche 944

2 Answers

Power windows not working, I am just now buying vehicle and the seller is telling me it's probably the motor. But, I see it as highly unlikely that both motors would go out at the same time and with the cost of the motors being $200 each, I don't want to replace them if it's not needed. The seller mentioned at first that it might be the electrical connection points, but he says that he checked that , and that was not it. Do you have any idea as to what this might be?

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  • jakuza1979 Jul 20, 2010

    having issues with the power windows of a car I'm thinking of purchasing. Seller says it is the motors because he says he checked the electronic points and those are fine. But, I find it hard to believe that both of the motors went out at the same time. Is it possible that it could be a fuse that controls both motors, rather than both motors?

  • jakuza1979 Jul 20, 2010

    Thanks for the help. also the quick response!

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2 Answers

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  • Porsche Master
  • 6,826 Answers

OK, it is unlikely that both motors would go out at the same time and you check the electrical connections with a test light to see if flipping the switch one way or the other gives you a light or power on the circuit. If it does and the motor doesn't turn, then you have to replace the motor or motors.

You can also use a self powered test light or a multimeter with a continuity beeper to test if the coils in the motor are ok. Disconnect the motors from the harness and then probe the connectors to test the wiring within the motor.

Hope this helps.

Good luck on your purchase. I like Porsche motor cars.

Posted on Jul 20, 2010

  • 2 more comments 
  • jakuza1979 Jul 20, 2010

    that's what I figured but I figured a second opinion never hurts. Plus, like I said, I just can't bring myself to believe that both motors went out at the same time. Is it possible that it might be a fuse?

  • Duane Wong
    Duane Wong Jul 20, 2010

    Yes, anything in the circuit, including a fuse, could be the culprit.

    I never worked on a Porsche 944 from 1984, but have seen them around town a lot since the 1980s.

    So, I do not know where the fuse box is on it.



    On GM cars, the fuse can be underneath the dash or under the hood.



    The fuse is probably the first thing that was checked, but I wouldn't leave any stone unturned, so to speak.



    If the fuse were bad, you wouldn't get current at the test light at the motor.



    It does seem unlikely that both motors went out simultaneously, I agree, but on the other hand, anything is possible with a car that is 26 years old. So, it should be checked out.

  • Duane Wong
    Duane Wong Jul 20, 2010

    May I ask how much you paid for the vehicle? I think that the last time I saw one for sale in Pennsylvania where I live, I saw a couple for $5000 a piece. They're nice cars.



    Again, good luck on your fixing the power window problem in your Porsche.

  • Duane Wong
    Duane Wong Jul 20, 2010

    You're welcome.

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  • Master
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The first step on trouble-shooting power window is to check for free play. Check for forward and backward and side to side movement (free play) on the regulator. Lube the two most import spots on the movement of the power window with grease. (CIRCLED IN RED) The second weaken spot on 944 window are the gears inside the motor. Before you spend money to purchase a new driver and passenger side motors you should hear for noise//sound when you press on the power window buttons. You should remove the motor and lube the internal gearbox with white lithium grease. I use CRC motor cleaner to clean test the motor brushes. Carb.cleaner is also good for a this type of clean up. There are complete unit at eBay for under $50 per side. You should clean and test your gearbox first.

Posted on Jul 20, 2010

  • 1 more comment 
  • Vincent_G
    Vincent_G Jul 20, 2010

    The pictures did not show up. I'm adding them now.




  • Vincent_G
    Vincent_G Jul 20, 2010


    Open and lube gearbox.


  • Vincent_G
    Vincent_G Jul 20, 2010

    I use CRC to rule out electrical contacts and dirty brushes problem in on shot!



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