In this video come along as I replace these electric brakes on this camper travel trailer and repack the wheel bearings.Remember to follow your shop manual f. On electric brake systems, the operation of the brakes can be checked by activating the emergency stop system to see if it brakes the wheels, or by unplugging the trailer from the vehicle and energizing the trailer brake control circuit with a 12-volt battery to apply the brakes (be sure to use circuit breaker or fuse-protected jumper wires). . In this video come along as I replace these electric brakes on this camper travel trailer and repack the wheel bearings.Remember to follow your shop manual f. . Champion Trailers can provide yearly maintenance, modifications, and repair on most boat and utility trailers such as brake install, bunk support install, axle and suspensions, lights, electric brakes, and much more! A FREE repair estimate is part of our customer service and our goal of keeping YOUR trailer rolling. How Electric Brakes Work on a Trailer. Electric brakes on a trailer don’t just function on their own accord. When you own electric brakes, if you want them to work, they will need to be hooked up to something known as a ‘brake controller’. The purpose of the brake controller is to tell the electric brakes when they should be engaging.