USED AUX PORT TO CHARGE CELL PHONE. WITH IN SECONDS SMOKE STARTS COMING FROM DASH. AFTER CONTAINING FIRE I REMOVED DASH COVER TO FIND THAT THE POWER WIRE THAT CONTROLS AUX PORT AND OBD2 PORT HAD OVER LOADED AND CAUGHT FIRE WITH CAUSED INTERNAL DAMAGE TO ALL ELECTRICAL AND INTERNAL DASH. AFTER DOING COMPLETE WALK THROUGH I NOTICED IN FUSE BOX UNDER THE HOOD THAT THE FUSE THAT CONTROLS 2 AUXS HAD MELTED DOWN. RIGHT FUSE WAS INSTALLED BEFORE ELECTRICAL FIRE. DURING TIME OF INCIDENT VEHICLE WAS MOBILE IN TOWN ON PUBLIC ROADS. AFTER CAB OF PICK UP STARTED FILLING WITH SMOKE I PULLED OVER AND USED CHEMICAL FIRE EXTINGUISHER TO SMOTHER FLAMES.