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Thread: Dimmer Control wire again

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    Regular Member Ian S100's Avatar
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    Default Dimmer Control wire again

    The lighing lead in the cig lighter doesn’t seem to have any signal going to it, maybe because there no light on the socket – is there another easily accessable lead I can use to dim my Alpine HU

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    Regular Member Ben H's Avatar
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    I wired my Alpine up to the illumination wire at the head unit & that did sqwat all from there.
    You got to watch, come to think of it my illumination is lowered and you don't get a full 12v for the hed unit to detect the illuminaton is on. Try turn it up to max & see if it works then. I'll have to try also.
    You really need to source a 12v illumination from the back of the headlight switch but don't know if the Vectra head light switch would work like this being Canbus.

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    Regular Member Ian S100's Avatar
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    The headlight switch is fed by very fine wires which I'm guessing are low just voltage triggers. As you say I need one that gives me a full 12v feed

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    Regular Member stickshift's Avatar
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    Quote Originally Posted by Ian S100 View Post
    The headlight switch is fed by very fine wires which I'm guessing are low just voltage triggers. As you say I need one that gives me a full 12v feed
    I think they work via can bus, so be careful that you don't fry anything!

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    Regular Member Ben H's Avatar
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    Quote Originally Posted by Ian S100 View Post
    The headlight switch is fed by very fine wires which I'm guessing are low just voltage triggers. As you say I need one that gives me a full 12v feed
    New Audis are the same and you can find a suitable 12v illumination there. It's not going to draw any current, it just needs to sense it.

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    Regular Member Ian S100's Avatar
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    Can the power to the cig lighter illumination be switched on via Tech 2 - is it intended to supply a reg bulb on an LED & carries a low voltage. I can't find my megga so can't test it for a low voltage only know it doesn't carry 12v

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