[dmarty]

You would think so, but that's not always true. Bad grounds are weird and do strange things. I had one were the heater control in the dash kept blowing fuses and not working right. Fianlly found a ground strap off between the frame and cab at the right front rubber doughnut. You can start checking all the brake light grounds, but you should also check the others. Did anything change recently on your truck? Any new wiring for a sound system or other lights? Any accident damage? If so, you should check those areas too.