Went to move the combine today parking brake would not release with the togle switch only way I could get it to release was to turn on the flashers overide then it would release and I could move the combineI could flip the brake switch and it would come on or off. Turn the flashers off and the brake  would come on and could not turn it off with switch. Anyone have an idea what to look for. Hope mice haven't chewed a wire. Thanks Ken