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post #1 of 13 (permalink) Old 06-11-2011, 09:31 AM Thread Starter
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Ambient Light Sensor

I am wondering if anyone has had any luck tweaking an annoying habit that the 'balts seem to have.

The ambient light sensor seems to need an extraordinary amount of direct light to raise the (dim) level of the radio and DIC. Unless it is extremely bright outside, I find it necessary to turn the "auto lights" off to see my radio and information display. A lot of the time, the dim is so low I can't see a dang thing. The dimmer itself is turned all the way up, by the way.

I'm sure this is a BCM issue and there's not much hope to change it, but I suppose it is possible that somone figured something out (or can at least share in my misery).

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post #2 of 13 (permalink) Old 06-11-2011, 04:29 PM
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Can't say I've ever had this problem before, but I drive an '06. Could be an '08 problem maybe?


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post #3 of 13 (permalink) Old 06-11-2011, 04:56 PM
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Mine does the same, I drive an 07, sometimes it just takes a sec to register the brightness outside I guess. I just got use to it, it doesn't happen that often.
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post #4 of 13 (permalink) Old 06-12-2011, 06:28 AM
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My 09 is the same. I have complained at the dealer but they tell me this is normal. Thats bull. I have had a few cars with DRLs and none were this bad.
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post #5 of 13 (permalink) Old 06-13-2011, 03:18 PM
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Quote:
Originally Posted by Bamaro View Post
My 09 is the same. I have complained at the dealer but they tell me this is normal. Thats bull. I have had a few cars with DRLs and none were this bad.
Did they have the auto head lights thats what is causing the problem and if you just over ride them with the swich the promble goes away.
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post #6 of 13 (permalink) Old 06-14-2011, 02:31 PM
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I have an 08 and I don't really have this problem.

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post #7 of 13 (permalink) Old 06-15-2011, 06:54 AM
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happens to mine too. but i turn the auto lights off during the day anyway.
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post #8 of 13 (permalink) Old 06-17-2011, 07:12 PM
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Did they have the auto head lights thats what is causing the problem and if you just over ride them with the swich the promble goes away.
Yeah you can over ride them by turning your lights off but that defeats the purpose of DRLs.
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post #9 of 13 (permalink) Old 06-18-2011, 08:27 AM Thread Starter
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Yeah, I pulled the DRL fuse when I put in my HID's while back. I fear I'll just have to live with turning off the auto lights. Lame.

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post #10 of 13 (permalink) Old 09-10-2011, 09:42 AM Thread Starter
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Sorry to bring this post back from the dead, but I decided to give this issue another whack. Primarily because I'm tired of my HID's cycling on-and-off because of my garage. Doing some general web (and some cobalt specific) searches, it seems some people have solved this problem by disconnecting the sensor at the BCM and wiring in a resistor to trick the computer into thinking there's daylight.

My shop manual says the ambient light sensor is in BCMx2:
Pin 44, L-Gn/Bk
Pin 47, Ye/Bk

Anyone ever tried this? If not, I will volunteer my car as a test subject and post the results.

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