Troubleshooting Curt Echo Wireless Trailer Brake Controller Locking Up Brakes at Low Speeds  

I have the Curt Echo Wireless brake controller for my 2018 Ford F-150 4x4, and am towing a 2021 Coachmen Freedom Express Ultra Lite 257BHS travel trailer. For the first 1,000 miles or so, I had my brake controller setting at level 7 aggressiveness, and level 7 for power, and it towed and brake great. After taking it on another weekend trip under the same settings, Im not getting a harder braking at lower speeds where the brakes feel like they stick, then let go kind of hard after releasing the brake pedal. Doesnt feel like theyre sticking at high speeds when traveling down hills, etc. Just seems like in town speeds, and especially when stopping. My Curt controller says 6-24 volts on the cover. I have double Dexter axles with electric brakes on my Freedom Express trailer, and I read that Dexter recommends a brake controller w/ proportional braking from 2 volts to 12 volts for ideal smooth braking. Since the Curt wireless brake controller starts at 6 volts, could this be the reason for the sticking/harder breaking at lower speeds and coming to a stop? Or, is there something I should check on the brakes themselves for causing this? Also, what setting should I look at using on my wireless brake controller to avoid hard stopping, and get a smoother braking experience? Thank you.

asked by: Preston J