Window Speed Question | FerrariChat

Window Speed Question

Discussion in '348/355' started by jim94-348, Sep 2, 2010.

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  1. jim94-348

    jim94-348 Formula Junior
    Owner Silver Subscribed

    Aug 19, 2010
    981
    Greenville, NC
    Full Name:
    Jim
    I just purchased my 348 a couple months ago. The windows go up and down fine but they take about 5- 10 seconds to go from fully down to fully up. Is this common? I just ask because on my BMW when they went slow there was something broken and eventually the whole unit failed and don't want the same thing to happen here. Just trying to head off future problems.
     
  2. notbostrom

    notbostrom Formula Junior

    May 8, 2006
    957
    Orlando, FL
    Full Name:
    Ben

    It's normal.. the search button is your friend.. Might want to do a search for "348 primer" it will answer the next 10 questions you will have
     
  3. troppoveloce

    troppoveloce Formula Junior

    Jan 25, 2006
    268
    New Hampshire
    Full Name:
    Tom
    My 1994 348 does the same thing. From what I've seen, they all do.

    Now, I'll go out on a limb here, because I'm pretty new to all this, and I could easily be wrong given the length of my Ferrari experience.... but:

    Your motors are likely to be OK. In systems where the windows are slow because of weakening motors, you can usually see a big improvement in speed up/down if you grab the window and assist it with your own strength. In my car, applying force to the window with my hand does nothing to the speed, so I'm confident the motors are not weak; they're just operating at the speed they're able to given the voltage they've got coming to them.

    Anyway, my own reading suggests that the problem can usually be attributed to low voltage at the window motor.

    It seems that the low voltage condition is the result of two major issues:

    1. Inadequate grounding and undersized wiring (gauge).
    2. Ferrari's choice to use a two-wire system that flips +/- from one wire to the other, instead of a three-wire system that can take advantage of a proper (permanent and local) ground.

    My window motors show about 10 volts at the door, so I'm probably a little better off than most (and they're still slow). Hope that helps.
     
  4. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
    34,785
    Ontario, Canada
    Full Name:
    Mike
    Typical - Miltonian has a solution I believe, it requires replacing all the wires. He posted an excellent thread on the matter but I do not recall what the title is.

    PM Miltonian, he may know how to locate the thread.
     
  5. notbostrom

    notbostrom Formula Junior

    May 8, 2006
    957
    Orlando, FL
    Full Name:
    Ben

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