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Thread: 2013 VW CC almost everything short to ground HELP!

  1. #11
    Verified VCDS User
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    Quote Originally Posted by morski View Post
    What caused the wires to melt in the first place? Definitely looks like a wiring issue where there could be more damaged wiring further up/down in the loom. I would suggest getting hold of a engine bay wiring loom and refitting that and not waste time trying to repair the original unless you are ok with unwrapping big sections of it
    Not sure what caused it, I did already unwrap and put back 85% of under hood wires related to all faulty modules. However I haven't check the positive feed to alternator side. The code below refers to battery terminal wiring:

    012423 - Voltage Supply Relay for Engine Components
    P3087 - 000 - Electrical Malfunction - MIL ON

  2. #12
    NostraJackAss Jack@European_Parts's Avatar
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    Did you first check each consumer of DTC record for direct short?
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    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
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  3. #13
    Verified VCDS User Gremling's Avatar
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    Try to disconnect cables/penetrator from alternator, clear fault codes and perform scan. There has been some issues where diode brigde in alternator fails, and this drags down/short the 12VDC. Check engine component current supply relay J757 in Fuseholder B, and Terminal 15 voltage supply relay J329.
    Do you have issues with cruise control as well??
    I do am not mistaken the many of the modules you have problems with, has 1 common -> connection 87a, which should be positive connection (no13), please check this, and the wiring between these sensors and Red and white in engine compartment harness.

    Regards
    Gremling

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  5. #14
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    Yaaaaaassss!!!! Problem solved!!!

    Tracked down the shorted wire, it was on transmission!


    All suggestions, advise and opinions highly appreciated!!!

  6. Likes Jack@European_Parts, Uwe liked this post

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