anyone know anything about this?

I know if I replace the Footwell Module, i'm going to have to re program it to my VIN but that seems like i shot in the dark.. how do I know that the module is the culprit.

It seems like there is one module that controls both headlights and other lights too.. so If the left isnt working and i plug it in the right side, that means the headlight assembly with ballast and bulbs are all fine...

So that means the "left side" of the module is bad?