Light Sensor???

[ranorris2]

Not sure if that is the correct term for it, but where is the "light sensor"? The sensor that determines when to turn your headlights on if they are in auto, and I assume its the same sensor that controls whether the navigation is in day or night mode?

I think "that" sensor is not working properly on my hoe...during the night it works fine...turns on the headlights, nav is in night mode...during the day though, my headlights may or may not come on when in auto mode, and the nav may or may not be in night mode. It's pretty much a 50/50 chance it thinks its dark outside when its bright out...its really pissing me off and I need to know if this is normal, lol, or if I have a f***ed up sensor.

Thanks for any help.

-Ryan

 

[soulsea]

It's the little bubble plastic thingie on top of your dash in the center by the defroster vents.

---------- Post added at 05:36 PM ---------- Previous post was at 05:33 PM ----------

This is one from an NBS but it looks similar:

 

[ranorris2]

I figured thats what it was...does it sound like mine is performing like it should compared to yours and/or others? How do I test this sensor, or would it be best to just buy a new one? I would think they cant be expensive, but then again it is gm, most of their crap is way overpriced...

 

[soulsea]

The sensors themselves are cheap ... I just don't know what's involved with swapping them. Could be as easy as unplugging the old one and plugging in the new one, or knowing GM, it could require disassembly of the entire dash.

Have you fiddled about with your nav display settings lately ?
Sometimes that can muck it up.

As far as the way mine work, keep in mind that these things are somewhat complicated.

There's the basic if it's night it goes into night mode and day in day mode.
But there's also times, in bad weather or an eclipse , where the sensor communicates with the clock and realizes that even though it's dark out it is still day time. In these instances it will turn the headlights on but still keep the display on day mode.

Is that what you're talking about?

 

[ranorris2]

I have not messed with the nav settings since i installed it a few months ago...I guess really I could care less if my headlights come on whenever, but what really bothers me is when the nav has the black background instead of the white when its bright and sunny outside. If my headlights are on my nav is dark, and sometimes headlights can be off and my nav will be on dark mode, if nav is in day mode my headlights are off...idk how to explain it because it doesn't happen all the time.

 

[soulsea]

Sounds like there might indeed be a problem there, you shouldn't have the dark background during the day.

I believe the PN for the sensor is 25713063, but double check to be sure. And I don't know how much is involved in replacing it.

However, this might not be a sensor issue since from what you describe the relationship between the sensor and the lights seems correct. Meaning that it's not turning your lights on or off when it shouldn't. This would leave one to think that the news might be worse than a simple sensor failure and that your nav might be having an issue.

 

[Modded]

I say you replace it. It should be cheap and very easy to replace. I am thinking of replacing mine only because sometimes it seems as if my headlights stay on too long during a sunny day after leaving a dark garage.

 

[ranorris2]

Sounds like there might indeed be a problem there, you shouldn't have the dark background during the day.

I believe the PN for the sensor is 25713063, but double check to be sure. And I don't know how much is involved in replacing it.

However, this might not be a sensor issue since from what you describe the relationship between the sensor and the lights seems correct. Meaning that it's not turning your lights on or off when it shouldn't. This would leave one to think that the news might be worse than a simple sensor failure and that your nav might be having an issue.

I will start and end with installing the new sensor and seeing if that works...if it doesn't then when it starts pissing me off I will just manually switch it on the nav, ill show that navigation who is boss haha...

And how do you find these part numbers so quickly? I have been looking for that number and could not find it lol

I say you replace it. It should be cheap and very easy to replace. I am thinking of replacing mine only because sometimes it seems as if my headlights stay on too long during a sunny day after leaving a dark garage.

Yeah i agree with you, it should switch alot quicker...in my lexus the switching is immediate, sometimes i can be driving through a tunnel or under some bridges and it will switch back and forth instantly....

 

[soulsea]

The switching is supposed to lag behind so as not to turn the lights on and off unnecessarily over a brief change in ambient lighting.

And lol about the part nos ... yeah, I've looked up so many parts I've gotten the hang of where and how to look for them quickly.

 

[ranorris2]

Just picked one up on ebay for a total of $13.56....

Here is the link to one if you want one Modded: 25713063

---------- Post added at 08:06 PM ---------- Previous post was at 08:00 PM ----------

The switching is supposed to lag behind so as not to turn the lights on and off unnecessarily over a brief change in ambient lighting.

And lol about the part nos ... yeah, I've looked up so many parts I've gotten the hang of where and how to look for them quickly.

Well I should mention on my lexus the headlights would not come on in the brief changes but the interior lighting would brighten up and the nav would turn to the dark mode which is nice whether its suppose to be that way or not haha

Unfortunately for you, you just won free PM's from me when I need a part number for my hoe hahahaha jk

 

[soulsea]

Unfortunately for you, you just won free PM's from me when I need a part number for my hoe hahahaha jk

Any time bud.

 

[gnarpow]

Anyone have an idea how to replace said sensor? My lights / nav screen are doing the same thing in the denali. One trip they could stay on in bright sunlight, the other they may be off. Probably about 50/50% here too.
Any help is appreciated. For under $20 i'll order it asap as long as I don't have to remove the dash or anything crazy to replace it.

 

[Modded]

Thanks for the link Ryan.
And Mike it should not be very hard. If I remember right the sensor is on a part of the dash that pops off. The forward part that is closest to the windshield. So basically one should only have to pop that part off, unplug the sensor, pop the new sensor in, plug the harness back in the sensor, and put that small but long dash piece back on.

---------- Post added at 12:18 AM ---------- Previous post was at 12:18 AM ----------

And Ryan let me know how yours goes before I spend the $13. Just in case mine is normal lag that I just happened to notice.

 

[metal4all6]

Does anyone know how to pop that dash piece off? I haven’t messed with mine yet, but do you just pull it up and off? Is there any 'trick' to getting it off?

 

[gnarpow]

Any updates on this? Did you get the part yet and was that the reason the lights were staying on?
Thanks

 

[ranorris2]

Still waiting on the part to get here :/


Sent from your boss's iPhone using Tapatalk

 

[Kolt-46]

To fully remove the panel that the sensor is mounted to, remove your A-Pillars. The clips that hold the panel down are located on passenger compartment side of the panel (the edge closest to the driver). They just pop off with a little pressure.

 

[Erebos]

If my headlights are on my nav is dark, and sometimes headlights can be off and my nav will be on dark mode, if nav is in day mode my headlights are off...idk how to explain it because it doesn't happen all the time.

I have seen the same thing happening on my Yukon as well, I can't find a way to reproduce it and when I took it into the dealer, obviously they can't reproduce and therefore can't really fix the problem. I know the feeling of how annoying it is to drive around on a bright day light and can't see a damn thing on the nav because everything is black. You would have to put you face directly in front of the nav to basically see the shade of what's on the screen. Let me know if you made any progress by changing out the sensor.

 

[ranorris2]

I have seen the same thing happening on my Yukon as well, I can't find a way to reproduce it and when I took it into the dealer, obviously they can't reproduce and therefore can't really fix the problem. I know the feeling of how annoying it is to drive around on a bright day light and can't see a damn thing on the nav because everything is black. You would have to put you face directly in front of the nav to basically see the shade of what's on the screen. Let me know if you made any progress by changing out the sensor.

I will be sure and update this thread as soon as I get the part...usps has really screwed up the delievery...the ebay seller shipped the day after I bought it so I can't blame him. USPS is the culprit they haven't updated tracking since after the third day of having it, which is nothing unusual that I have seen from the post office

 

[soulsea]

Blaming the messenger is usually a metaphor ... this time it's REAL!!!