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paddler67, I have a '05 f-350. The early build with the intergrated brake controller doesn't supply much power to the trailer brakes until you are going 15 mph. That problem was fixed on later build models. I installed a switch from an always hot wire, by-passing the controller. It's a momentary on/off switch. Should I need brakes to hold the trailer under 15 mph.I use the switch. Only a couple times have I used it. Bill
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