Put it back to original. test the plug in the car.

-I suggest you connect the wiring as it was stock from the factory
-remove the hopkins controller
-make sure the OEM trailer module is installed near the battery cover and its wiring is stock

using a test light at the vehicle-side plug in the car, test the various functions.

If they don't work, you have a problem up the line (you have already tried 2 modules)

If they do work (and they should), you have a pblm with the harness between vehicle-side plug and trailer plug.