Service brakes, air › Antilock › Control unit/module
Reported Sep 12, 19942,574 vehicles affectedALLIED SIGNAL TRUCK BRAKEBuilt Oct 1, 1990 – Aug 1, 1994
The defect
The rubber seat on the armature of the solenoids can swell causing the normally open inlet solenoid to restrict or block the trailer service brake control air pressure passage.
The risk
Restriction causes reduced trailer service brakingaction. Blockage causes complete loss of trailer service braking action. Thereis no warning of the deterioration of the trailer service brakes, which canresult in loss of vehicle control and an accident.
System: brakes; control assembly.equipment description: MC-12 modulator controller assembly.note: if the vehicle IS presented to an authorized dealer on an agreed uponservice date and the remedy IS not provided free of charge within a reasonabletime or the remedy does not correct the defect, please contact allied signal at1-216-329-9000. Also, contact the national highway traffic safetyadministration's auto safety hotline at 1-800-424-9393.