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Thread: Stumped by the stereo wiring

  1. #1
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    Question Stumped by the stereo wiring

    Hi there,

    I've recently tried to tackle my lack of a stereo, it works as I tried it my other car.

    I've traced and the switch ignition (red/brown) all the way to the ignition switch and it buzzes out ok.
    I've done the same with the red/white to the back of the fuse box. Ground buzzes out on other grounds too.
    So I'm a little stumped what to do, when lights are on it lights up (grey/blue illumination), when battery is connected security light flashes.

    Anything I'm not doing that I should be? I've used this wiring diagram https://imgur.com/Q7rOWsk

    16v Moonlight Blue
    1994 VR6 Green Pearl

  2. #2
    CF Nutter fendervg's Avatar
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    What make stereo is it? IGN+ and BATT+ usually need to be reversed to work an aftermarket unit properly.
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    93 Corrado VR6
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  3. #3
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    Quote Originally Posted by fendervg View Post
    What make stereo is it? IGN+ and BATT+ usually need to be reversed to work an aftermarket unit properly.
    VW Gamma from a mk4 golf

    16v Moonlight Blue
    1994 VR6 Green Pearl

  4. #4
    CF Nutter fendervg's Avatar
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    Have a look at these and see if they help...

    I'll also try and PM you another PDF I have with more details on the Gamma in English - it's too large to attach here.

    Actually, PM me with an email address if you need it - can't attach files to PMs.
    Attached Files Attached Files
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    93 Corrado VR6
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  5. #5
    ⋆⋆ CF Donator ⋆⋆ swiftkid's Avatar
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    That PDF doesn't seem to work fender.

    Try this: https://pinoutguide.com/Car-Stereo-V...H_pinout.shtml

    If it's lighting up, powered up etc. I'd hazard a guess and say the pins are wrong on the plug into the head unit itself. Even if ignition live & permanent were mixed up it would still fire up.

    Red 16v gone
    Red VR32.. WIP

  6. #6
    CF Nutter fendervg's Avatar
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    Yeah, I don't think the attach feature is working properly since the last set of forum issues - it also won't let me upload a jpg, keeps complaining that it's not a valid file, even though I know I have attached the self-same image to another post before.

    I sent culshaw another doc I have, so hopefully that might help with the pinout. One thought I had - is it possible that it's code disabled? In that case you need to leave it powered on for a long time before it resets itself.
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    93 Corrado VR6
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  7. #7
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    Quote Originally Posted by swiftkid View Post
    That PDF doesn't seem to work fender.

    Try this: https://pinoutguide.com/Car-Stereo-V...H_pinout.shtml

    If it's lighting up, powered up etc. I'd hazard a guess and say the pins are wrong on the plug into the head unit itself. Even if ignition live & permanent were mixed up it would still fire up.
    It lights up as in if you turn on your lights, it'll illuminate.
    It doesn't get backlit, the only indication it's receiving power is a flashing security light

    I think it's definitely getting power, because i've blown a fuse when two wires touched, after that. I've disconnected the battery like a good boy

    16v Moonlight Blue
    1994 VR6 Green Pearl

  8. #8
    ⋆⋆ CF Donator ⋆⋆ swiftkid's Avatar
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    See in the link I attached, I'm betting you've got the first 2 wires on top row connected and 1st wire on second row connected. Check the 3rd wire along on top row as that's your ignition live

  9. #9
    ⋆⋆ CF Donator ⋆⋆ ben_wooduk's Avatar
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    I've recently fitted a gamma myself but it started doing some funky stuff first, try my thread here, someone helped me crack it my changing one wire

    http://the-corrado.net/showthread.ph...-K22-BRW/page8
    Ben Wood
    CCGB #3443
    1993 Black VW Corrado 2.9 VR6

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  10. #10
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    Thanks guys,

    I've followed that pinout guide to no avail. I did some more voltmeter investigations.

    ignition to stereo buzzes out (i expect this is normal) - reading of around 0.07
    ignition to r/wh (perm live) when turned to accessory position buzzes out - reading of -0.05
    ^ I have a feeling this is not normal

    Also switched the wires around between perm live and ignition to see if security light flashes when key in accessory position, it didn't flash.

    Could something be shorting?

    16v Moonlight Blue
    1994 VR6 Green Pearl

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