Problem with the rear tail light bulb assembly wiring. This is a poor design with intermittent failures that causes your brake, side marker, and blinkers to fail and not work. The wiring harness / plug assembly shorts out and stops working. The plug is short with a plastic plug. The mopar part assembly replacement cost over $600.00 dollars and is not guaranteed to last. Jeep forums state this is a recurring problem with multiple replacements ending in the same result failure again. They know this is a flaw and yet do nothing about it. This is not normal wear and tear as the plug actually shorts out.