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BMW e46 320d Touring: Rear Window Heating Issue - Checking Current with Multimeter & Repair Tips

eclipse10 8022 14
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 16866138
    eclipse10
    Level 8  
    Hello. It's about heating the rear window in touring. The point is that all the strips do not heat well, or in some places as if the vogels did not heat. In one place, in the middle of the glass, there is more or less a place the size of a matchbox that if I touch it, after some time it becomes so hot that you can burn yourself. I corrected the left extreme with thermal varnish where these lines go to such a black strip and in my opinion it did not work. I bought a multimeter and I saw somewhere that you can check the current through these lines and it will come out where it is interrupted, etc. But I do not know how to go about it. I am asking someone involved in the subject for help. When turning on the heating, you can hear a tick in the trunk as it comes on.
    I fixed it the second time and wiped off the black edges under them there is probably a wire and it goes to the strip that distributes the electricity to all the threads, I also corrected there with a conductive varnish and now only one strip heats up and not even all the way to a certain place, in the attachment there is a photo of the same windows and the place where it heats.
    link
    link
    link
    link
    link
    link
    In general, my first post on the forum.
    Thank you in advance and best regards.


    Regulations: Instructions for posting photos and diagrams on the forum
    Mod. [Camera]
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  • #2 16866173
    coperfild
    Level 35  
    IT and you can't even insert the link properly, if you want help, try it.
  • #3 16866204
    eclipse10
    Level 8  
    coperfild wrote:
    IT and you can't even insert the link properly, if you want help, try it.

    Because I can't put links yet, I don't have enough points, so with a space.
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  • #4 16866327
    sebap
    Level 41  
    Upload photos to the electrode server.
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  • #5 16868114
    eclipse10
    Level 8  
    I posted photos
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  • #6 16870657
    eclipse10
    Level 8  
    Can someone help me?
  • #7 16872790
    eclipse10
    Level 8  
    Probably no one, and apparently so many specialists here ...



    Moderated By T5:


    3.1.9. Don't be ironic and don't be mean.

  • #8 16882393
    eclipse10
    Level 8  
    Will someone help me?
  • #9 16882419
    melas
    Level 31  
    You have measured the voltage on the power supply of those, if it is 12v above on the working engine, then the glass needs to be replaced, what if the belts are not fixed.

    Added after 1 [minutes]:

    These stripes are the main points where the cable connections are.
  • #10 16884127
    helmud7543
    Level 43  
    I failed. The gasket rubbed off the varnish immediately, electric arcs can be seen in the darkness in the places of painting, in some places the glass started to melt. I am trying to replace the glass, but I wonder if it makes sense - the glass is not stiff when opened, it will wipe again in some time. But according to for me it is the only effective solution in this car - it is not a sedan with a stiff glass.
  • #11 16886684
    eclipse10
    Level 8  
    helmud7543 wrote:
    I failed. The gasket rubbed off the varnish immediately, electric arcs can be seen in the darkness in the places of painting, in some places the glass started to melt. I am trying to replace the glass, but I wonder if it makes sense - the glass is not stiff when opened, it will wipe again in some time. But according to for me it is the only effective solution in this car - it is not a sedan with a stiff glass.

    What are electric arcs? How is it noticed?
    I do not believe that the glass needs to be replaced because there are burned stripes or something like that, since this is someone who did it and if he did it, he goes to fix it, then it is not a space shuttle, in my opinion. I don't think there's an America there, maybe I'm wrong because I'm not an electronics engineer. From what I read, it works on the principle of a short circuit, that current flows through these strips and thus they start to heat up. I am asking someone to explain to me what in such a simple system can also break apart from the stripes. Now one strip is warming me, but it is going to burn myself.
  • #12 16886942
    zibi999
    Level 16  
    I have heard about something that evaporates glass preparations can spoil the heating of windows, did you use any preparations?
  • #13 16888118
    eclipse10
    Level 8  
    zibi999 wrote:
    I have heard about something that evaporates glass preparations can spoil the heating of windows, did you use any preparations?

    Never in my life
  • #14 16888135
    dzinks16
    Level 1  
    There are electrically conductive varnishes. Maybe there is a break in the paths somewhere.
  • #15 16888434
    helmud7543
    Level 43  
    eclipse10 wrote:

    What are electric arcs?

    Sparks, blue flashes in the places of varnish.
    eclipse10 wrote:

    How is it noticed?

    Paint it, turn it on and observe the repaired places after dark. When you look closely, you can see it in the day.
    eclipse10 wrote:

    I do not believe that the glass needs to be replaced because there are burned stripes or something like that, since this is someone who did it and if he did it, he is going to fix it, it is not a space shuttle, in my opinion.

    You write that you have a station wagon, in the station wagon the glass is opened and all the time it gently rubs against the seal, if you have breaks there, the paint will wipe off quickly. If you find a durable and hard varnish, if there is one, it will work. I tried and the effect as described.
    eclipse10 wrote:
    I don't think there's an America there, maybe I'm wrong because I'm not an electronics engineer. From what I read, it works on the principle of a short circuit, that current flows through these strips and thus they start to heat up. I am asking someone to explain to me what in such a simple system can also break apart from the stripes.

    The beams and relays are still breaking down, but you have it working, because nothing would work.
    eclipse10 wrote:
    Now one strip is warming me, but it is going to burn myself.

    Because not all of them work and those who work overheat.
    You can still try to smear it with a soft pencil (graphite conducts electricity) but it will not work for a long time (I tested).

Topic summary

The discussion revolves around a heating issue with the rear window of a BMW E46 320d Touring. The user reports that the heating strips do not heat uniformly, with one area becoming excessively hot. They attempted repairs using thermal varnish and a multimeter to check for current interruptions. Responses suggest measuring voltage at the power supply, inspecting for breaks in the heating strips, and considering the replacement of the glass if issues persist. Some users mention the potential for electric arcs and the impact of window seal wear on heating efficiency. Conductive varnishes and graphite as temporary solutions are also discussed.
Summary generated by the language model.
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