I have a 2003 Durango that I use to tow a two horse trailer. I have an ongoing problem with the brake system. It is a Tekonsha system, which is supposed to be great. But it keeps grounding out. When I step on the truck brakes, they grab. When I turn on the right turn signal, the truck brakes and\or the trailer brakes grab or lock up. I've had no less than 5 mechanics look at it. They all say the system is grounding out. They clean connections and check the elctric stuff and say it's good to go. But it starts happening again, anywhere from a few months to a few minutes later. I've replaced the entire system once, and it happened again, so I am thinking there is something wrong with the truck, not the Tekonsha.
The only other vehicle I've towed with the Durango was a 26' camper trailer. In that case, the indicator light on the control box was either bright red or totally green. There was no apparent difference in the braking, no matter what color the light was.