This started developing a couple of days ago. we are driving without the trailer, and we start getting “trailer disconnected” messages. Then yesterday, also “TBC fault” error messages. Sin ec this was happening only when there was no trailer, this was tolerable. However, today as we are pulling the trailer, the same starts happening. At one point, I could feel the trailer braking, even though I wasn’t, and sure enough, after stopping in a safe spot, I could smell the trailer brake pads overheating. We disconnected the trailer umbilical, which is risky for emergency braking, and gives no idea of what we are doing to anyone behind us, but was safer that causing the brakes to catch on fire. Will try and get that repaired tomorrow.