Vehicle recall 81V032000 · March 18, 1981
1981 Mack MS300T
On certain vehicles, the semi-trailer stop lights may not activate when hand control lever is activated.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- On certain vehicles, the semi-trailer stop lights may not activate when hand control lever is activated.
- 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.
- Notes
- 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.
Recall details
- NHTSA campaign
- 81V032000
- Reported to NHTSA
- March 18, 1981
- Filed by
- MACK TRUCKS, INCORPORATED
- Vehicles potentially affected
- 150
- Initiated by
- the manufacturer
- Components
- Exterior lighting › Brake lights › Switch
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack MS300T (1981): 1981
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.