1993 318is coupe electric windows stopped working - Page 2

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    #11
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    M14RKH, thanks for the reply. I can't bring myself to think that both regulators would die at the same time. If it was only one side not working I would have checked regulators, etc but the fact that both sides failed at the same time makes me think it's 1 component further back the line which effects power supply in some way which is causing this.
     
     

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    #12
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    Check the wiring that runs from the vehicle to the boot lid. The wires are prone to breaking due to the bending of the loom on opening and closing of the boot lid.

    You will need to peel back the loom and check the entire length of exposed wire.

    The wires break the plastic protective coating which allows them to touch other wires which can cause no end of electrical issues within the vehicle

     
     

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    #13
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    That's an idea. Could I just disconnect the fuses and or relays for all components in the rear - lights,indicators,brake lights, reversing light, numberplate lights, internal boot light.
    Think thats it?

    That would prove whether I have to investigate further or not, yes?

    Although it could be easy to check the cables, wife has car at mo so I can't have a quick look.
     
     

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    #14
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    Checked the wires Rym. No issues there.

    Windows still only work when car runing over (about) 2700 rpm.
     
     

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    #15
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    Quote Originally Posted by gildersol View Post
    From what M14RKH says it sounds like a common issue. Did the windows work fine before you replaced the starter? If so it does seem strange that both windows would be faulty (not impossible though). Is everything connected up ok. There is a signal from the starter to the windows related part of the ZKE. The wire is black/green. It's worth a check to see if it's connected ok.
    Gildersol, I'd like to investigate that route about the wire coming from the starter to the zke module.

    What does it do?

    I have only 3 wires connected to the starter. 2 to the larger connection and 1 to a smaller one beside it.

    I'm asking because they guy who repaired the starter said that it must be a different starter than the original because there was a 4th connection which is not in use for something else. I did find another wire around the starter area but it was never connected and was sealed up.

    Can the starter have anything to do with the windows? I wouldn't think so but anything is possible I guess.
     
     

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    #16
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    Another update.

    The higher I rev the car while driving the better the windows seem to work.

    At 4500rpm they practically worked perfect. Figure that out??
     
     

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    #17
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    thw unused wire you found next to the starter. Was it black/green?
    Is anything else playing up? wipers, washers, OBC,clock?
    The black/green wire which would normally be connected to terminal 30h on the starter provides an earth to some components which need to be disconnected during starting.
    One of these is the ZKE
     
     

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    #18
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    Quote Originally Posted by gildersol View Post
    thw unused wire you found next to the starter. Was it black/green?
    Is anything else playing up? wipers, washers, OBC,clock?
    The black/green wire which would normally be connected to terminal 30h on the starter provides an earth to some components which need to be disconnected during starting.
    One of these is the ZKE
    Gildersol, just checked bentley manual and confirmed what you said.

    The cable was not connected when I was disconnecting the starter and as I said earlier, it was an old cut on the wire. I'll look tomorrow night to see if it's black/green and trace it back to zke. I guess then there should be a wire there or some circuits would be damaged? But why would they be ok before?

    Of course it's possible I moved/cut this wire while while attempting to remove the starter - just not ruiling that out.

    Question is would that cause a fault in the zke which would prevent widows from working below 2700-3000 rpm. And no, nothing else is affected.

    Thanks for the input
     
     

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    #19
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    The unused terminal on the starter is for Automatics, the wire that stops the car from starting in gear goes to it.

    Have you tested the alternator output yet?
     
     

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    #20
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    Quote Originally Posted by Ronnie View Post
    The unused terminal on the starter is for Automatics, the wire that stops the car from starting in gear goes to it.

    Have you tested the alternator output yet?
    So for a manual gearbox that terminal/wire is not used so I can rule that out then, yes?

    Havn't tested alternator output yet. Are you going along the lines of it not producing enough at low revs to run the motor, same kind of idea I was on about earlier which brings me back to the question, do the car electrics run on alternator generated power while running and do the wndow motors require alot of power to work?

    But they normally work with car turned off also so would that not rule that out, yes?

    Could be getting somewhere here...... or not....
     
     

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