I've read many posts on several different forums (Colorado, Frontier, now Ram) the hassles of aftermarket brake controllers. Thus I was determined to buy a truck with a factory integrated unit.
My last truck was a Frontier which has a factory harness from dash to tailgate. To install an aftermarket unit, you just have to buy an adapter to fit your particular unit into the factory harness, and add a one relay. Simple as that, or so I thought. But not for me...
I bought my Frontier with an aftermarket controller installed by the previous owner, but it was a cheap unit that I wanted to upgrade. I bought a new unit on Amazon and went to plug it in, and guess what I found? The outfit that installed the other unit had used their own custom-made cable from dash to tailgate, not using the factory harness or any adapters. They also chopped up the factory harness at the tailgate to splice into it for power and what-not. I read on the Frontier forum this is common by after-market installers, they'd rather run all their own gear from front to back than stock different adapter harnesses. More profit for them, and the customer walks out that day with the unit installed. It's just the next guy who is screwed and has to undo that mess...