Hey all, I want to see if anyone can help before I have to bring this to the dealer. Trying to install a trailer brake controller but getting some issues.



I used an OEM part, then with forscan activated the modules. Double checked the fuses.



The dash says "no trailer detected" but lights work.



I popped in a tester, then turned on the truck. This was here.



Lt = left turn

Rt = right turn.

Tm = Taillights





It stays like this till i hit the truck brakes, then I get trailer connected.







If I leave the brake pressed, it d

Goes to an error:



Then trailer disconnected.



Next I tried plugging in the tester AFTER the truck started. Then followed the sequence: left turn, right turn, vehicle brake, trailer brake controller. The left and right work. But the moment I try the vehicle brake...


https://youtube.com/shorts/XA1dL-0W8Jk?feature=share



Something doesn't seem right with the brake connection maby? I'm lost