MACK MC 1978: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE
NHTSA Campaign ID Number: 79V014000
| Make | Model | Year |
|---|---|---|
| MACK | MC | 1978 |
| Date Owners Notified | Date Received by ODI | Date Added to Database |
| 1979-02-02 | 1979-01-09 | 1979-10-12 |
Production Dates: 1978-03-01 - 1978-11-17
Manufacturers Involved: Mack Trucks, Inc.
Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE
Potential Number Of Units Affected: 358
Report Initiator: MFR MFR Report
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.
DEALER WILL REPLACE THE PORTION OF THE EXISTING HOSE THAT IS CLOSEST TO THE ACCESSORY RELAY WITH AN ALL-RUBBER HOSE.
VEHICLE DESCRIPTION: TRUCKS.SYSTEM: ELECTRICAL; HEAT DUCT HOSE.CONSEQUENCES OF DEFECT: DUE TO A LACK OF CIRCUIT BREAKER PROTECTION, FIRE ANDLOSS OF ALL ELECTRICAL CIRCUITS, INCLUDING HEADLIGHTS, CAN OCCUR AND POSSIBLYLEAD TO A VEHICLE ACCIDENT.
