The defect
THE INVOLVED VEHICLES MAY HAVE BEEN BUILT WITH POWER UNIT ANTI-SKID LOGIC MODULES ON TAG AXLE INSTALLATIONS INSTEAD OF THE CORRECT TRAILER TYPE MODULES. SINCE THE TAG AXLE SENSOR OUTPUT IS LESS THAN THAT OF THE POWER UNIT SENSOR, IT REQUIRES THE MORE SENSITIVE TRAILER MODULE. AS SENSOR OUTPUT OVER TIME DROPS BELOW MINIMUM REQUIREMENTS, ONE OF TWO THINGS WILL HAPPEN: (1) THE ANTI-LOCK SYSTEM ON THE TAG AXLE WILL SHUT DOWN AND THE CAB MOUNTED FAULT LAMP WILL LIGHT OR (2) THE SYSTEM WILL BECOME INOPERATIVE WITHOUT ACTIVATING THE FAULT LIGHT. THIS FAILS TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKES".
The remedy
DEALER WILL REPLACE THE INCORRECT ANTI-LOCK MODULE WITHOUT CHARGE TO OWNER.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|
Components: SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE
Other service brakes, air recalls in 1978
32 of the 272 recall campaigns reported to NHTSA in 1978 concerned the service brakes, air; WHITE MOTOR CORPORATION filed 143 campaigns in all.
| 78V260000 4 Dec 1978 | INTERNATIONAL HARVESTER |
| 78V241000 25 Oct 1978 | HENDRICKSON MFG. CO. |
| 78V235000 23 Oct 1978 | POLAR COMPANY |
| 78V231000 20 Oct 1978 | PIKE TRAILER COMPANY |
| 78V234000 20 Oct 1978 | DORSEY TRAILERS, INC. |
| 78V230000 20 Oct 1978 | BUTLER MANUFACTURING |
| 78V233000 20 Oct 1978 | BUDD COMPANY |
| 78V232000 20 Oct 1978 | WALKER EQUIPMENT |
NHTSA recalls (public domain) · all recalls of 1978