1993 318is coupe electric windows stopped working - Page 3

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  1.  
    #21
    Bimmer Fan
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    jamesore's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1993
    Transmission Type:
    manual
    Car Body Type:
    coupe

    Join Date
    Apr 2009
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    Ireland
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    By the way by battery died after I replaced the starter. It went flat while trying to fix the windows and it was sunday so I decided to get ripped off in Halfords ....€104 compared to £82.99 uk when the exchange rate should be about €86....well anyway. Jump leads didn't work and nobody was around and needed car.

    Point is, battery is:
    http://www.halfords.com/webapp/wcs/s...egoryId_165762

    Considering other battery must have been almost wasted to begin with if trying to get windows working flattened it is this battery good enough? Using their online guide I selected it as the mid range one which would suit the car.

    Would this and the other flattened battery have any bearing on my dilema? Just throwing it out there...
     
     

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  3.  
    #22
    Bimmer Fan
    Car Details
    jamesore's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1993
    Transmission Type:
    manual
    Car Body Type:
    coupe

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    Ireland
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    Another update

    Went on long 120 mile journey at weekend.
    By the end of the journey I found that both windows were working perfectly, even at low revs and I also tested them after I turned the car off and they still worked - one touch up down also.

    The next day they were back to the same just working at high revs. I found that if I want to put the window up before I park a few brisk revs will allow me to do this.

    After about an hour on the return journey the windows started working fine again for the remaider of the journey. After parking up back to the same way as before

    Tested battery voltage - 12.68
    Tested alternator voltage while car idleing - 13.9 (ish)

    Help - Thought I had something until I checked alternator output (was expecting it to be too low and only hit 14v at 2700 rpm)
     
     

  4.  
    #23
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    Car Details
    jamesore's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1993
    Transmission Type:
    manual
    Car Body Type:
    coupe

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    Ireland
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    Anyone any ideas or just don't know or couldn't be bothered...
     
     

  5.  
    #24
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    andyxxxx's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1996
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    Manual
    Car Body Type:
    Coupe

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    Newcastle, UK
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    Could it not be a bad earth connection to the window units? Causing them only to work when that bit more current is passed to them?

    Unless they are controlled by 2 seperate units?... then it would be unlikely.

    It's a long shot but I used to own a peugeot, so the answer to most of my electrical questions was "bad earth connection"
     
     

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    jamesore (12-05-2009)

  7.  
    #25
    Dr of BMW gildersol's Avatar
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    Could be a bad connection or dodgy switch. Maybe it's vibration when you increase the revs that makes the connection.
    May be time to check with a multimeter or test lamp whether the switches are operating properly and 12v is getting to the window motors when the switch is operated.
     
     

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    jamesore (12-05-2009)

  9.  
    #26
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    jamesore's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1993
    Transmission Type:
    manual
    Car Body Type:
    coupe

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    Ireland
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    Thanks for the the replies guys. I'm determined to figure this one out if I have to test every wire there!!

    A synopsis of the issue and tests so far

    0 - 2700rpm (ish) - Windows inoperatable
    2700 - 3500rpm (ish) - windows move in jolts of 1-5 inches, can hear relay in control module constantly clicking.
    3700 - and above windows work perfect.

    After prolonged driving at high revs windows remain working perfectly even at low revs and when car is turned off (this happeded once). When car is restarted back to the same. I restarted once within 2 minutes of long journey and windows were back to not working.

    Switched control module - no diffrence
    swapped switches to opposite sides (didn't have spare to try) - no difference
    Tested alternator output at alternator terminal and battery with load - all ok.
    All fuses checked and ok.

    Should there be 12 volts at the switch? I didn't test voltage, just a contuinity test between earth and the other 2 relevant wires and they were ok with both switches.
     
     

  10.  
    #27
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    jamesore's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1993
    Transmission Type:
    manual
    Car Body Type:
    coupe

    Join Date
    Apr 2009
    Location
    Ireland
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    Well thanks to all 'trying' to help solve my window problem. I now have fully working windows. I done nothing, just waited. The windows started working at lower and lower revs and sometimes with the car off. Now they wor fine all the time. Doesn't make sense I know but I am relieved. They are a bit jumpy so I'm going to overhaul the regulators and grease the runers at some stage but no hurry for the moment.

    Thanks again..
     
     

  11. The Following User Says Thank You to jamesore For This Useful Post:

    gildersol (17-06-2009)

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