So for Christmas, my mother in law bought me some aftermarket LED tail lights which look good, but not happy overall. I opted for cheaper $120 pair since I didn't want her spending $350. They were purchased from CARID.com, (Never buy from again) and were received with a crack at the bottom. I did notice the crack until the following day after they were installed. I knew it happened before installation because some of the plastic was in the shipping container. I contacted CARID about this. Long story short, they wouldn't replace it because I installed it already. (Should have lied I guess.) There was some moisture inside the lens. I sealed it after getting the moisture out. So, after all this, fast forward 3 weeks later. They tail light both started hyper flashing when they were working normal before. The LED lights came with resistors, so i'm guessing they went bad? Any ideas what else could cause the hyper flash? They were working normal for 3 weeks with the blinker. Lights work, brake lights work, and they emergency flasher is actually normal speed. The only thing that isn't is the blinker.

This is on my 2011 F150 Lariat.

 

First off check for any bulbs out for the front blinkers. If you’re good there, then I’d say the resistors aren’t working.

Does your truck have the gem or bcm? You could try forscan and see if you can turn off the bulb out
indicators for the front and back. That’s what I did for my LED tail lights. I have a 2013 though. Might not work on your 2011.

 

dont forget the third brake light

 

Not sure about the 2011, but on the 04-08 we use an EP27 flasher instead of resistors to avoid hyper flash. I'm thinking one of your resistors went bad.

 

Yep, i'm sure that's it as I check all the lights. Company, (CARID) will not help me by replacing them though. They said the warranty was voided because of a broken light I received.

https://www.f150forum.com/f2/buy-car...8/#post6486030