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2011 Race Red XLT
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Discussion Starter · #1 ·
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.
 

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Moderstrator
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1,528 Posts
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.
 

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2011 Race Red XLT
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18 Posts
Discussion Starter · #5 ·
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.
Automotive tire Tread Automotive design Motor vehicle Alloy wheel
 

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17 Lariat Supercrew 4x4 SCLB Max Tow
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523 Posts
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.
 

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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.
 
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