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550 window motor/regulator

Discussion in 'Technical Q&A' started by ajyiii, Oct 19, 2023.

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  1. ajyiii

    ajyiii Formula Junior
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    #1 ajyiii, Oct 19, 2023
    Quick backstory is that my window started to get real slow at the top (closing) and then it started to do the same at the bottom (opening) but was working fine and at normal speed in the middle range. I sent the video to a friend at Ferrari Lake Forest and was told that when acting like that it doesn't necessarily mean the motor is shot and that I should clean up the tracks and all the old excess white lithium grease that was in there. Pics below - bottom line I tried to clean up what I could and even add lubricant to the tracks but I didn't see an improvement. So i'm checking to see if there are any specific culprit spots that I should make sure to address of if i'm missing a part of that "cleanup" process they refer to. And really wanted to see if there are opinions on here regarding replacing the window motor (I dont see a need to do the full regulator as the window is perfectly aligned and i've had no issues with that). Thanks in advance for any help!

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  2. wmuno

    wmuno Formula Junior
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    #2 wmuno, Oct 20, 2023
    I don't have this specific car, but I have worked on several different types of power windows. Besides the grease on the actuator arm, there are several other pivot points. These will benefit from some oil; you can operate the window to see where they all are located. Finally, I spray silicon into the felt/rubber window tracks. This reduces the friction as the glass moves up and down. If this doesn't solve the problem, it might be an allignment issue that just isn't quite right.. There are several adjustment in the mechanism. Before you change anything, be sure to mark the current setting. If changing one of them doesn't work, return it to its original setting and try another one. This is a bit of a trial and error procedure; but as long as the motor is good, you should be able to fix your window.
     
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  3. fatbillybob

    fatbillybob Two Time F1 World Champ
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    #3 fatbillybob, Oct 20, 2023
    The above^^^

    And...Ferrari wiring is very poor. Make sure you are getting full power to the window motor before you decide to replace it.
     
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  4. ajyiii

    ajyiii Formula Junior
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    #4 ajyiii, Oct 23, 2023
    @fatbillybob and @wmuno thank you both very much for replying! My kids had games all weekend so I was unable to get back to the window, but tonight ill figure this out. Its the strangest thing, it works totally fine and moves at correct speed in the middle of travel, starts to slow down and come to a complete stop both on the way to full close and on the way to full open. Like as in it won't fully close nor fully open. I did wipe a lot of the lithium grease form the tracks and aded some lubricant and as of last I tried it didnt help much.
     
  5. wmuno

    wmuno Formula Junior
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    #5 wmuno, Oct 24, 2023
    There might be sensors to stop the motor when it reaches the end of the window travel (either up or down). You need to research this information for your specific model. If there is too much friction in the mechanism, it could cause the motor to stop prematurely.
     
  6. Qavion

    Qavion F1 World Champ
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    #6 Qavion, Oct 24, 2023
    No sensors for top or bottom of travel. There is only one at the gap height (when you open the door). As you say, however, "friction" controls the motor. The window ECU measures the friction by way of current change going to the motor (for a certain time period). When the window hits something (endstops, foreign object or high friction points) the current changes.
     
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  7. ajyiii

    ajyiii Formula Junior
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    #7 ajyiii, Oct 27, 2023
    Ah well that makes a lot of sense regarding the current being regulated and explains why the delaer said to clean up all the tracks. Thanks.
     

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