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Thread: Rear View Mirror - what is this bit....??

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    confused Rear View Mirror - what is this bit....??

    ....on the non mirror side of my rear view mirror, i.e the part of the mirror that faces towards the bonnet, there is a hole with some sort of sensor?! in it. Any ideas what it does?

    Thanks

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    Regular Member Harry's Avatar
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    i think it's used for two things. it measures the ambient light outside so that the self dimming mirror can function, and also uses that ambient light reading to switch on the little light bulb at the base of the rear view mirror. i think that's right anyway.

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    Default mirror

    Hmmm thanks Harry

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    Regular Member Harry's Avatar
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    Quote Originally Posted by bennyk View Post
    Hmmm...
    what's the Hmmm for? are you not convinced?

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    Full Member Big Sig's Avatar
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    Is it not for the auto lights too if fitted?
    Now I need a turbo to keep up!

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    Regular Member Harry's Avatar
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    Quote Originally Posted by Astrase20 View Post
    Is it not for the auto lights too if fitted?
    yep...i think it would be used for that too.

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    No, the auto lights function has a sensor on the dash board .... i think

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    Full Member Big Sig's Avatar
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    Quote Originally Posted by denzo View Post
    No, the auto lights function has a sensor on the dash board .... i think
    That little lump on the centre of the dash is for the climate control.... could be another sensor there too though.... anyone know for sure
    Now I need a turbo to keep up!

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    Vehicle : Vectra

    Trim : SRI NAV XP

    Engine : 1.9 CDTI 150

    Year : 2007

    Mileage : 72K

    Default

    Quote Originally Posted by Harry View Post
    i think it's used for two things. it measures the ambient light outside so that the self dimming mirror can function, and also uses that ambient light reading to switch on the little light bulb at the base of the rear view mirror. i think that's right anyway.
    The little light bulb you refer to is called 'indirect night lighting' which shines on the centre console and gearstick area, when it is dark. You can test this in the daytime by covering the sensor with your fingertip before switching on the ignition, and it should illuminate and remain so until the ignition is switched off. Standard on all pre-facelift except for LS/Life, Expression and Club trims. Not sure about facelifts though.
    Last edited by john_k_sri; 26th September 2007 at 11:18. Reason: addition

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    Regular Member sig63's Avatar
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    Vehicle : Opel Insignia

    Trim : Cosmo

    Engine : 2.0 CDTI

    Year : 2011

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    Quote Originally Posted by denzo View Post
    No, the auto lights function has a sensor on the dash board .... i think
    No, the sensor for auto lights is on the windscreen, same place as rainsensor

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