Reported Mar 18, 1981150 vehicles affectedMACK TRUCKS, INCORPORATEDBuilt Nov 1, 1980 – Feb 1, 1981
The defect
On certain vehicles, the semi-trailer stop lights may not activate when hand control lever IS activated.
The remedy
After inspecting brake light system, a switch will be installed which will activate the trailer stop light when the hand control valve IS used, if necessary.
Vehicle description: heavy trucks.system: lighting; rear brake lights, trailer stop lamp wiring.consequences of defect: rear-end collision could result due to failure oftrailer stop lamps. Operater of vehicle to the rear would not be warned ofbraking action on affected vehicles.