Trying to find the flasher relay , and what it might look like on a 2014 F 150 STX.

 

It doesn't have one. It's an internal function of the BCM. Why are you looking for it?

 

I installed LED signals and get hyper flash

 

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That's what I suspected. You will need to use Forscan to fix it or install resistors.

https://forscan.org/home.html

You need the extended license, a Windows laptop, and a compatible OBD2 adapter.