Mack WS Brake Bulb Size
The Mack WS brake light requires a 1157 bulb size for proper installation and function within the lighting assembly. Data for 1157 bulbs covers the range from 1981 through 1984.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Bulb Size by Year Range
| Years | Bulb Size |
|---|---|
| 1981-1984 | 1157 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 |