I wired mine that way. Towing presents some complications. One thing to note is that when the brake lights come on so do the trailer brakes. I have found that works very well if you are running on a freeway using cruise control. However, if you are in on steep curvy road then the trailer brakes never completly let go so they can get hot. I am going to change mine so that I have a switch to turn this setup on or off.