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NHTSA Campaign 79V014000

VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

Issued by MACK TRUCKS, INCORPORATED · Reported Jan 9, 1979 · 358 vehicles affected

What's wrong

A DEFICIENCY IN THE ROUTING OF THE HEATER DUCT HOSE COULD ALLOW THE HOSE TO REST AGAINST A TERMINAL POST OF THE ACCESSORY RELAY. VIBRATION WILL EVENTUALLY CAUSE THE TERMINAL POST TO PENETRATE THE HOSE FABRIC AND SHORT CIRCUIT THE WIRE REINFORCEMENT AND OVERLOAD THE CIRCUIT.

Remedy

DEALER WILL REPLACE THE PORTION OF THE EXISTING HOSE THAT IS CLOSEST TO THE ACCESSORY RELAY WITH AN ALL-RUBBER HOSE.

Vehicles affected by this recall

Make Model Year Units
MACK MC 1978 358
MACK MR 1978 358

Source: NHTSA Campaign 79V014000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.