[badal38257]

My 2011 headlights started a new thing where after being on for a couple minutes both of them turn off (or at least to DRL setting) for about 10 seconds then come back on for a couple minutes in a repeated cycle. The foglights work the whole time. The passengers side has occasionally flickered for the past week or so and its also making a somewhat loud hum when on. I'm pretty sure at least the bulbs are aftermarket, maybe the whole housing. Any ideas? I saw " CANBUS anti-flicker resistor (also called a decoder)" mentioned in a similar post on here.

 

[Boatwaco]

Definitely sounds like a relay or other controller is going out. I've attached the Exterior Lighting chapter from the 2009 - 2014 F150 workshop manual for you. Perhaps you can use that for initial troubleshooting until someone else more knowledgeable chimes in.

 

[EcoXLT]

More info. Are they halogen, HID, LED? Did truck come originally with halogen? I don’t think you would need canbus for Halogen. Can you find the part that is humming? Maybe some pics of parts if you aren’t sure what it is.

 

[SrpRacing]

That almost sounds like an as-built data issue in the BdyCM. As in the truck thinks the key is off and is utilizing the 10 sec delay timer before shutting off the lights….

But I would check the fuses and/or relays.

 

[badal38257]

I didnt pull the headlight but it looks like LED to me. I dont know what it was originally. If i can figure put how to post a vid, it picked up the noise pretty good. Sounds like its right behind the bulb.

 

[EcoXLT]

Looks LED to me also.

 

[FanaticalKilla]

Those are definitely led. Some led bulbs have fans attached to them for cooling. It would seem like you have a failing relay or switch. The BCM could be freaking out. A good scan tool may help or it may not.

 

[EcoXLT]

I’d try some halogen bulbs and see if that fixed it.

 

[SrpRacing]

Agreed. Throw some halogen bulbs back in there.

 

[EcoXLT]

I read a couple articles about LED in halogen housings and both stated that LED’s have less lumens at as little as 50 ft away then halogens do. That’s less usable light I think. Seems weird as LED are really bright.