We had a brake controller on our toyota 4runner, which I took out when we traded it in on our new (04) F150. this is no doubt a dumb question, but the truck has a factory tow package with a 7 pin plug installed. It also has a plug well hidden under the dash to accept a brake controller. One guy told us that the tow package will connect the trailer brakes, but we need a controller to adjust the amount of braking applied to the trailer. Some one else said with out the brake controller there is no connection between truck brakes and trailer brakes. We are towing without the controller on this trip because I need to find a wiring harness that connects the BC we have to the plug under the dash. I can't tell if the trailer brakes are stopping because the trailer is so light and the truck has good brakes. We aren't attempting any steep grades this trip, but I'd really like to know if we have trailer brakes without a controller.