module

I have a brake light relay module for my elantra. Confirmed from mechanic that is reason all brake lights don't work. Any one know where it goes? It's not the fuse box in the engine bay. It's the black piece in the pic. It's just sitting on top.

Hi all, My technician just told me that the reason I have no electrical power at the fuel door actuator is because “the module” is bad. He tells me that it’s a multi-function module and (a new or used one) would need to be programmed by a Hyundai dealer. I cant find any info online on this...