I have a new to me 2001 Coachmen Clipper. I had a brake controller and seven pin receiver installed on my 2013 Ford Escape Titanium which already had a trailer tow package with 4 pin. When I hooked up the connections and started to roll out the driveway the brakes are squealing. If the connector is not hooked up the brakes are fine. Are the brakes engaging and staying engaged? The trailer battery is not on the trailer yet. I will be replacing all brakes, parts as well as the bearings. Should I replace the brake pull on the trailer as well? I do have portable lights to get me to the garage.