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19 Denali ultimate

Auto high beam headlight issue. **SOLVED**

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I have a 19 Denali ultimate with the automatic system for the high beams and am having an issue.  I was also wondering if anyone else had a similar problem and what was done to fix it.  About 95 to 98 percent of the time they will not activate at all, it is like the push button switch on the end of the turn signal isn't working.   The odd time it does come on, it will shut off randomly.  I completely understand how the system works, so I know that all the necessary circumstances are being met for them to work, but the system shuts off completely.   I can try turning the auto high beam system on over and over time and time again but it won't turn on.  It is going in soon for another recall and will have  it checked then but was curious if I am not alone in this lol.   Thanks.

Edited by 19 Denali ultimate
Issue fixed.

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I believe the sensor in the center of the dash will activate the system by indication of the icon appearing on the left side of the gage cluster. The windshield front camera then controls whether the headlights go dim or bright depending on the what the camera detects ahead of the vehicle. Are you having problems with anything else the camera controls? Lane Change Alert, Lane Keep Assist, Forward Collision Alert and Forward Braking? Do the headlights come on in Auto in a timely manner when darkness prevails? My Intellibeam system will at times go on and off when it is cold outside and ice has been cleared off the windows. During the summer, no problem. Winter is a different story.

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On my '18, short "burst" of HIGHs (turn signal forward and back to neutral, less than 1 second) turns my Intellabeams ON/OFF, and while the Intellabeam HIGHs are ON, engaging my HIGHs (even momentarily) turns them off.  Flash to Pass does not turn them on/off.

 

Other than that, I'd dig through your vehicle settings.

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On my 2020 I noticed that auto bright does no work when you turn on your fog lights. If I keep my dogs off, the auto high beams work fine. Weird if you ask me...

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On 1/1/2020 at 2:58 PM, Frasierts said:

On my 2020 I noticed that auto bright does no work when you turn on your fog lights. If I keep my dogs off, the auto high beams work fine. Weird if you ask me...

My '18 is the same way.

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On 12/23/2019 at 10:11 PM, 19 Denali ultimate said:

I have a 19 Denali ultimate with the automatic system for the high beams and am having an issue.  I was also wondering if anyone else had a similar problem and what was done to fix it.  About 95 to 98 percent of the time they will not activate at all, it is like the push button switch on the end of the turn signal isn't working.   The odd time it does come on, it will shut off randomly.  I completely understand how the system works, so I know that all the necessary circumstances are being met for them to work, but the system shuts off completely.   I can try turning the auto high beam system on over and over time and time again but it won't turn on.  It is going in soon for another recall and will have  it checked then but was curious if I am not alone in this lol.   Thanks.

It is currently at the dealership getting fixed.  They told me that there is an ambient light sensor in the front bumper that was faulty.

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6 hours ago, 19 Denali ultimate said:

It is currently at the dealership getting fixed.  They told me that there is an ambient light sensor in the front bumper that was faulty.

I thought the light sensor was in the middle of the dash in front of that cubby hole. Use to be the temperature sensor was in the front grill. Guess I will have to look it up.

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I thought it was the camera behind the rear view mirror but I am only going by what they said, I'll know more when I pick it up.

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Posted (edited)

I’ve noticed the same with the fog lamps 

Edited by Jswaze88

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On 1/1/2020 at 5:58 PM, Frasierts said:

On my 2020 I noticed that auto bright does no work when you turn on your fog lights. If I keep my dogs off, the auto high beams work fine. Weird if you ask me...

That's the way its designed. Having fog lights on with the brights serves no useful purpose.  Fog lights are designed to illuminate the  road so you can see through the fog better. When the brights are on it makes seeing more difficult in the fog.  Fog lights are for safer driving not to over power oncoming traffic with more headlight power. 

The purpose of the fog lamp is to show the driver the road edges, lane markings and the foreground abruptly appearing during road drive. When used with headlamps in extremely poor visibility, a driver can maneuver safely at slow speed in snow, fog or heavy rains.

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11 hours ago, 19 Denali ultimate said:

I thought it was the camera behind the rear view mirror but I am only going by what they said, I'll know more when I pick it up.

The sensor in the dash controls when the intellibeam becomes activate while the camera in front of the rearview mirror determines when the brights turn on and off I believe.

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