'95 325i Photo Sensor

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frasuy - 23 Sep 2005 07:38 GMT

Any idea what the Photo Sensor is for? It's located on the radio right
below the anti left LED.

I read the radio owner's manual and it doesn't specifically indicate
what its for or purpose is.

Thanks for the insight.

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Don - 23 Sep 2005 14:58 GMT

> Any idea what the Photo Sensor is for? It's located on the radio right
> below the anti left LED.

At night - with the radio on - shine the glovebox flashlight at the
sensor, I think you'll see what it does..

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frasuy - 28 Sep 2005 05:27 GMT

Make sense...the radio display alluminates brighter. Thanks for the tip.

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Jeff Strickland - 28 Sep 2005 16:35 GMT

I never even noticed that sensor before!

I just tested your idea about the flashlight, and found that the display
brightens anytime a bright light is shown on it. It does not require night
time, nor does it require the headlamps to be on. As the light level changes
in the car, the display level also gets brighter or dimmer. More light makes
the display brighter, by the way.

>> Any idea what the Photo Sensor is for? It's located on the radio right
>> below the anti left LED.
>
> At night - with the radio on - shine the glovebox flashlight at the
> sensor, I think you'll see what it does..

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Don - 28 Sep 2005 17:03 GMT

> I never even noticed that sensor before!

Most people don't.

> I just tested your idea about the flashlight, and found that the display
> brightens anytime a bright light is shown on it. It does not require
> night time, nor does it require the headlamps to be on. As the light
> level changes in the car, the display level also gets brighter or
> dimmer. More light makes the display brighter, by the way.

I suggested night time since it is most obvious then.

Now - have you found the cells for the instrument cluster and the HVAC
controls?

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Jeff Strickland - 28 Sep 2005 19:50 GMT

>> I never even noticed that sensor before!
>
[quoted text clipped - 10 lines]
> Now - have you found the cells for the instrument cluster and the HVAC
> controls?

My life support system's control is the type with dials and knobs, so it
hasn't got a display.

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