Rear window de-mister, e36 325td 1995

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Thread: Rear window de-mister, e36 325td 1995

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  1. Rear window de-mister, e36 325td 1995 
    #1
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    Griffin's Car Details
    Model of Car:
    325td
    Year of Manufacture:
    1995
    Transmission Type:
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    E36 325td

    as title, the button light comes on but the rear screen doesnt clear, checked the fuse and ok. Any ideas on what/where to check?

    Also does this car have heated mirrors?

    Thanks
     
     

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    #2
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    cadoc's Car Details
    Model of Car:
    520i SE
    Year of Manufacture:
    1992
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    Unfortunately this is not a reply to solve your question !!
    But I've got exactly the same problem on my E34 520i. (i.e. button light on, fuse OK but no de-misting at all).
    Whereabouts on the car can I check for bad connections ? Is there a relay that can be checked and where is it ?
    Thanks in advance.
     
     

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    #3
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    Try to isolate the problem starting at the rear screen. Hopefully, you guys are familar in using a multimeter, so set to Volts, unplug and measure across the the 2 terminals that join onto the de-mister with the switch turned on. Hopefully you will get a voltage reading. Once confirmed, then set your meter to Resistance and measure across the de-mister terminals on the window that you took the power ones out from. You should get a resistance value as it is just a big power resistor. If not, then it looks like you might have a break(open) in the de-mister somewhere. Hope you understand what I have said ...
     
     

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    #4
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    Griffin's Car Details
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    Year of Manufacture:
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    Quote Originally Posted by NealP View Post
    Try to isolate the problem starting at the rear screen. Hopefully, you guys are familar in using a multimeter, so set to Volts, unplug and measure across the the 2 terminals that join onto the de-mister with the switch turned on. Hopefully you will get a voltage reading. Once confirmed, then set your meter to Resistance and measure across the de-mister terminals on the window that you took the power ones out from. You should get a resistance value as it is just a big power resistor. If not, then it looks like you might have a break(open) in the de-mister somewhere. Hope you understand what I have said ...
    That makes sense, thanks
     
     

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    Good...because that is only Part 1 ...Part 2 is coming up if you have no volts in those terminals.
     
     

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    #6
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    cadoc's Car Details
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    Yes, it makes sense - I understand voltage and resistance, but being a bit thick......where exactly are the terminals located ? (In the boot, underneath the rear shelf ? etc.,).
    I recently moved my daughter to uni. digs and completely filled the car up with her stuff so I think I may have disturbed something but can't see where !!
    Mine's a 1992 520i saloon model.
     
     

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    Follow the bottom track on the de-mist coil to see which side it terminates. There is a relay as well, so maybe you should check this out first.
     
     

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    #8
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    kolana59's Car Details
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    Year of Manufacture:
    2000
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    Hi there
    Same problem as above, where is the relay please.
    2000 328ci
     
     

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