CERTAIN DOUBLE TRAILERS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, AIR BRAKE SYSTEMS. CONTINUOUS POWER IS NOT PROVIDED TO THE REAR ELECTRICAL CONNECTOR ON THE TOWING VEHICLE AS REQUIRED BY THE STANDARD.
CERTAIN DOUBLE TRAILERS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, AIR BRAKE SYSTEMS. CONTINUOUS POWER IS NOT PROVIDED TO THE REAR ELECTRICAL CONNECTOR ON THE TOWING VEHICLE AS REQUIRED BY THE STANDARD.