DURING OPERATION OF VEHICLE, AND UPON APPLYING BRAKES, VEHICLE WAS REAR-ENDED BY ANOTHER VEHICLE TRAVELING APPROXIMATELY 20 MPH. DRIVER WAS TEMPORARILY KNOCKED UNCONSCIOUS AND EXAMINED BY MEDICAL PERSONNEL. WHEN DEALERSHIP EXAMINED VEHICLE IT WAS DETERMINED THE CLUSTER MODULE FAILED, PREVENTING BRAKE LIGHTS FROM ACTIVATING. PLEASE PROVIDE ANY ADDITIONAL INFORMATION / DOCUMENTATION.*AK