Fog lights questions! Function and upgrades

nicorico666 · Apr 8, 2025

Would love to be able turn Fogs and DRLs on while the headlights remain off, this is easy in my 22 tundra but can’t figure it out on this one. Maybe user error or it’s not possible, but if anyone has any insight I’d appreciate it!

Also, I have an idea to replace the fog lights with the standard fog lights of the trail hunter (white/amber color switching) has anyone done this yet?

Nodak · Apr 9, 2025

its the same procedure as the tundra. turn the lights to parking lights only. its been this way at least for my 14 4R and i am pretty sure for all toyota's for a long time.

Drizzt · Apr 9, 2025

On my 21 Highlander you can not turn Fogs and DRLs on while the headlights remain off. So I would like to know as well how to modify the new 4Runner to do this.

nicorico666 · Apr 9, 2025

Drizzt said:
On my 21 Highlander you can not turn Fogs and DRLs on while the headlights remain off. So I would like to know as well how to modify the new 4Runner to do this.

I’ll try to figure it out again tonight after work, and keep you posted. I’m pretty convinced it doesn’t work. And if it doesn’t, I’m really gunna try to find a work around.

nicorico666 · Apr 12, 2025

So, its definitely only able to fog lights on with the headlights on, seems lame to me. Going to try to find a way to work around this.

Drizzt · Apr 13, 2025

Let me know what you find out

zgreen · Apr 13, 2025

nicorico666 said:
So, its definitely only able to fog lights on with the headlights on, seems lame to me. Going to try to find a way to work around this.

Thanks for taking a look into it. Similar issue with the light bar on the Pro, as it will only go on with the brights on.

Slacker · Friday at 8:25 PM

Just picked up my 4 runner today (TRD ORP) and noticed I can't have high beams on and fog lights. Is there any way around this? They turn off once the high beams turn on.

Any solution to have both on?

JR1 · Friday at 8:36 PM

Every car or truck that I’ve ever owned would not allow the fogs when the brights are on. If you’ve ever tried your bright lights in heavy fog, it makes things much worse.

Slacker · Friday at 9:27 PM

JR1 said:
Every car or truck that I’ve ever owned would not allow the fogs when the brights are on. If you’ve ever tried your bright lights in heavy fog, it makes things much worse.

I have experienced that as well but I also like to turn fogs on when it's very dark for any additional lighting. I guess I just wish it was my choice. I have changed some coding on BMW's to allow it so I guess I was curious if this was possible. I am new to the Toyota gang (less than one day!!)

Mad Ghost · Friday at 10:41 PM

Slacker said:
I have experienced that as well but I also like to turn fogs on when it's very dark for any additional lighting. I guess I just wish it was my choice. I have changed some coding on BMW's to allow it so I guess I was curious if this was possible. I am new to the Toyota gang (less than one day!!)

Okay newbie how about you use "sir" when you address the rest of us who having been living in the realm of Toyota for some time. We're not longer talking about Euro Trash. Basically if you don't have it Toyota didn't mean for mortal man to have it. Kidding I worked for BMW back in the day and love the ultimate driving machine. Welcome to the Yoda family.... there are some aftermarket upgraded options for fog lights, like Cali Raised or Diode Dynamics but still programing as far as I'm aware would not allow you to run brights and fogs at the same time.