My brake controller on my truck keeps flashing Overload?? I cant figure out how to fix it. It all started when I got a flat tire and had to drive it back home 2-3 miles with it flat seing that it was a dual axle trailer it wasent a problem. Once I got home I threw on a brand new tire/rim and went back off to work and thats when I noticed the problem with the Overload light flashing on the screen. I checked for wires being pulled from flapping rubber but the wires are all run through the frame on the trailer. So later that month I rotated the tires on that side and the brakes started to work momentarely for about 5 minutes then it went back to flashing overload again. Anyone know whats going on here. The trailer is about 2 years old and this is the first of troubles with the brakes. I have checked the plug and it has no rust of any sorts on it.