Dealer can't Flashing computer for trailer brake

[bliond1]

Hello forum

I recently installed a used oem brake controller from ebay in a 2017 ram 1500 and today took it to the dealer to program it, but it didn't work, but the explanation they gave me was that it can't be flashed, because it is already programmed on another truck and can't be reprogrammed.

I’m kind of confused​

 

[nylonguy]

I gor a used one from a truck that was wrecked from eBay worked great I flashed it my self with alfaodb and works great the TBCM is not vin controlled from what I can find