Auto headlight sensor

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razboy
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Auto headlight sensor

Post by razboy »

OK guys, need some help. My auto headlight sensor is not working. I have been told it is located in the small black bump on top of the dashboard at the bottom of the windscreen, and also told by others that it is in the same housing as the rain sensor behind the interior mirror - car is a pre facelift 2009
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Cuprabob
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Re: Auto headlight sensor

Post by Cuprabob »

It's located on the rear of the interior rear view mirror. It's pretty obvious when you look at the rear of the mirror.
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razboy
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Re: Auto headlight sensor

Post by razboy »

Thanks, so what is the small black bump on top of the dash at the bottom of the windscreen?
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spacewalker
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Re: Auto headlight sensor

Post by spacewalker »

light and rain sensor is one (2in1)
reverse mirron is holding on iton the windscreen
CCS via MFSW in 2005
https://www.youtube.com/watch?v=JQ8cBbe ... e=youtu.be" onclick="window.open(this.href);return false;
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Cuprabob
Posts: 5036
Joined: Sat Aug 07, 2010 2:31 pm
I drive a: GT 2.0 TDI 170/184
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Options: Panoramic Roof, 19" Black Luganos, Vienna Leather, Parking Sensors, DAB, Dynaudio, Bluetooth, Cruise, Folding Mirrors, Xenons
Location: S/W Scotland

Re: Auto headlight sensor

Post by Cuprabob »

razboy wrote: ↑Thu Oct 06, 2022 9:08 pm Thanks, so what is the small black bump on top of the dash at the bottom of the windscreen?
Only thing I can think of is that it contains the antenna for the receiver for the remote locking.
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Roy_01
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Re: Auto headlight sensor

Post by Roy_01 »

Sunlight sensor for the AC system.
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razboy
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Re: Auto headlight sensor

Post by razboy »

Roy_01 wrote: ↑Fri Oct 07, 2022 10:35 am Sunlight sensor for the AC system.
would that sunlight sensor also control the auto lights on function?
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Roy_01
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Re: Auto headlight sensor

Post by Roy_01 »

No. The rain/light sensor on the windscreen turns it on and off.
The sensor on the back of your rear view mirror is for high beam assist.
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Cuprabob
Posts: 5036
Joined: Sat Aug 07, 2010 2:31 pm
I drive a: GT 2.0 TDI 170/184
In: Rising Blue
With a: Manual box
Options: Panoramic Roof, 19" Black Luganos, Vienna Leather, Parking Sensors, DAB, Dynaudio, Bluetooth, Cruise, Folding Mirrors, Xenons
Location: S/W Scotland

Re: Auto headlight sensor

Post by Cuprabob »

Roy_01 wrote: ↑Fri Oct 07, 2022 10:35 am Sunlight sensor for the AC system.
Thanks Roy, I forgot about that.
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