THE PRIMARY SERVICE BRAKE SYSTEM AND THE AUXILIARY BRAKE SYSTEMS ARE FED BY A SINGLE CIRCUIT WHICH MAY RENDER THE EMERGENCY BRAKE SYSTEM INOPERATIVE IF THE PRIMARY BRAKE CIRCUIT FAILS; TRUCKS DO NOT COMPLY WITH FMVSS 121.
RiskIN THE EVENT OF A PRIMARY BRAKE CIRCUIT FAILURE, THETRUCK WOULD BE UNABLE TO USE AUXILIARY BRAKING TO STOP, WHICH COULD RESULT IN AVEHICLE CRASH.
FixINSTALL HARDWARE TO ENSURE THE EMERGENCY BRAKE SYSTEM WORKS INDEPENDENTLY OF THE PRIMARY BRAKE SYSTEM.