I have a 2013 F150 EB with the built-in break control unit and electronic sway control setting. This past weekend was the first time that I had been able to tow with my new truck. I was very pleased how the truck performed, but didn't quite understand the Electronic Sway control. I did some experimenting with it and found it did help when on the highway, but was concerned with slow speed turning. I was turning into the campground (and later a gas station) and it sounded like my rear brakes were locking up during the turn. Is this normal? Should I had turned the sway control off first? Any info would be very helpful.