make sure the tire has proper air pressure and to test the break lights on a 4 prong setup , turn emergency light on . if emergency lights work then breaks work as well since they use the same element. your tire may not be round anymore ,if I stayed in same position too long , jack up the trailer and take the load off the tire by putting something under the trailer next time . touch the tire ,if it is hot ,you are under inflated . touch the bearing area if it is hot , you have a problem . they are ok if they are warm after 20 minutes of driving
