SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
VEHICLE DESCRIPTION: TRUCK/TRACTORS. THESE VEHICLES DO NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS." CONTINUOUS POWER IS TO BE SUPPLIED TO THE TRAILER ANTILOCK BRAKE SYSTEM (ABS) CIRCUIT. THESE VEHICLES WERE MANUFACTURED WITH A SWITCH INSTALLED IN THE ABS CIRCUIT.
Remedy: DEALERS WILL INSTALL AN ANTI-LOCK POWER CIRCUIT.
21 vehicles affected