I have 2005 F150 Lariat. I have replaced OEM bulbs with LED, both the head & fog lights. Now when I pull out the switch for the fog lights to come on my bright lights come on as well. That is the only way the fog's will come on.

 

There's a thread about that here somewhere. Let me see if I can find it.


EDIT- I also moved this thread to the appropriate section for this question.

 

https://www.f150forum.com/f4/led-hea...roblem-354627/


Here ya go. There's a few complaints about this issue in this section. This is just one thread.

 

Here's another.
https://www.f150forum.com/f4/led-hea...estion-347493/

 

I have the 05 lariat and and I want led headlights . But there is a steel post right behind my headlights with only a 1/2 inch of clearance to the present halogen plug .I was worried the long led fan may not clear the post . But you must not have had a problem .
I am thinking of buying from 4x4truckled.com site , he seems to have a handle on these problems . But for $150 ,I wanted to make sure they would fit .
I know his bulbs are not supposed to have your problem .

https://www.f150forum.com/f4/looking...lariat-354368/