Yukon SLT Fog Lights Setting

[KMeloney]

Check BoostAutoParts.com, simple connection. $23

2007 - 2024 GM All Lights Mod (6 High Mod)

This kit allows your fog lights and low beams to remain on along with your high beams on GM truck & SUV's from 2007-2024. Installation takes less than 10 minutes while following our video. Mod is also known as the All Light On Mod or the 6-HI modification. Free shipping included, and MADE IN THE...

boostautoparts.com

That doesn't exactly look like it's "plug and play," but at least it's something.

Now, does it keep the fogs on from the last time you turned them on? (Does it allow "auto-on" fogs when the headlights come on?) Tough to tell from the description.

 

[WalleyeMikeIII]

That doesn't exactly look like it's "plug and play," but at least it's something.

Now, does it keep the fogs on from the last time you turned them on? (Does it allow "auto-on" fogs when the headlights come on?) Tough to tell from the description.

On the web site, says not compatible wtih 2021, 2, 3, or 4.

If you check the upfitter site, you will find that the fogs On/Off is controled by the BCM (Body Control Module) signaling the LCM (Lighting Control Module), and the details imply the signaling from the LCM to the actual lamps is a PWM (pulse width modulated) signal (presumably to contol the brightness), not a constant 12V (It may not even be 12V, it could be 5V or less, since the fogs are LED.

Worse yet it appears the signal from the BCM is serial as well...so, it isn't real straight forward to pull this off.

See lighting section of this document, starting at pg 2-13. Esp the Description of Operations section.

 

[KMeloney]

On the web site, says not compatible wtih 2021, 2, 3, or 4.

And yet in the link description above, it says it is.

Thanks for confirming what I believed to be true in the first place!

 

[Doubeleive]

That doesn't exactly look like it's "plug and play," but at least it's something.

Now, does it keep the fogs on from the last time you turned them on? (Does it allow "auto-on" fogs when the headlights come on?) Tough to tell from the description.

they have a variety of different ones, I didn't read over all of them but it looks like they do have a option like that.

 

[Doubeleive]

On the web site, says not compatible wtih 2021, 2, 3, or 4.

If you check the upfitter site, you will find that the fogs On/Off is controled by the BCM (Body Control Module) signaling the LCM (Lighting Control Module), and the details imply the signaling from the LCM to the actual lamps is a PWM (pulse width modulated) signal (presumably to contol the brightness), not a constant 12V (It may not even be 12V, it could be 5V or less, since the fogs are LED.

Worse yet it appears the signal from the BCM is serial as well...so, it isn't real straight forward to pull this off.

See lighting section of this document, starting at pg 2-13. Esp the Description of Operations section.

you should be able to bypass all that nonsense with a simple relay, 12v to the light, triggered by whatever you please

 

[KMeloney]

they have a variety of different ones, I didn't read over all of them but it looks like they do have a option like that.

You read the post that says they do NOT have one for the '21-'24 Yukons, right?

 

[WalleyeMikeIII]

you should be able to bypass all that nonsense with a simple relay, 12v to the light, triggered by whatever you please

I don't think the light takes straight 12V, It takes a Pulse Width Modulated input of some sort (to the LED's). From the Schematic below, see red circled indicators. Common w/ LED's to control brightness and improve longevity.