My controller has a setting changeable by turning a thumbwheel that adjusts the amount of current sent to the trailer brakes. When I tow the empty car trailer, the setting has to be very low to prevent wheel lockup even with a light touch on the TV brakes. Then the setting needs to be higher when a car is on the trailer, in order to have sufficient brakes. Then with the 5er, a much higher setting. In all cases, when coming to a slow stop, as at a traffic light, I get some "grabbing" of the trailer brakes when I gently pump the TV brakes. My cure for this is to reach down and manually apply the controller brakes lightly while also applying the TV foot brake. This keeps the trailer brakes from fully releasing and then re-applying, and eliminates the "grabbing".
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.