United States 98V152000
PACCAR Incorporated
The problem
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS. THE AIR HOSES FROM THE RELAY VALVES WERE CONNECTED DIRECTLY TO THE SERVICE BRAKE CHAMBERS, RATHER THAN BETING CONNECTED THROUGH THE ANTI-LOCK BRAKING SYSTEM (ABS) MODULATOR. THIS DOES NOT COMPLY WITH FMVSS NO. 121, "AIR BRAKE SYSTEMS."
What owners should do
DEALERS WILL REROUTE THE AIR HOSES THROUGH THE ABS MODULATOR.
Units 24