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Heated Rear Window fault finding ...

Discussion in 'A4/S4 forum(B5 Chassis)' started by Mistwraithuk, Nov 1, 2009.

  1. Mistwraithuk
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    Mistwraithuk New Member

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    Hi all,
    Any electricians around? My rear heated window is not working, however the wing mirror demisting is ok. Checked the fuse, which I believe covers both, and that is fine.
    Any ideas how to test the actual rear window element? And where is the connection ?
    Thanks all,
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  2. andybnwc
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    andybnwc Member

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    multimeter or test probe
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  3. Mistwraithuk
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    Mistwraithuk New Member

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    Got one of those, any idea what sort of resistance i`m looking for ? Or maybe as long as its not to earth its ok ?
    I`m guessing i could read amps with meter in the ciruit to check the connection is ok ?
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Put the meter in voltage mode and measure across the lugs on the screen with it on and see what you get.

    If you get a voltage, then turn it off, disconnect the supply cable, and measure across the screen in resistance mode to see if you get a reading.

    Its unusual for the entire screen to fail in one go, they usually drop "lines" over time.
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  5. jcb
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    jcb Active Member

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    i would check the wiring loom where the door opens and closes for any damage or breaks
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  6. andybnwc
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    andybnwc Member

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    check for power at the connector terminal in the corner of the screen if nothing i would start from the front ie maybe the switch is faulty.
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  7. Mistwraithuk
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    Mistwraithuk New Member

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    ok thanks guys, i`ll start probing around :)
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