Mack Mid-Liner MS Series Courtesy Bulb Size
The Mack Mid-Liner MS Series courtesy bulb uses either 1003 or 912 size bulbs depending on the specific vehicle configuration. The replacement chart covers vehicle production spanning from 1981 to 1997 with corresponding bulb size data.
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 |
|---|---|
| 1997 | 1003 |
| 1996 | 912 |
| 1994-1995 | 1003 |
| 1990-1993 | 912 |
| 1989 | 1003 |
| 1988 | 912 |
| 1987 | 1003 |
| 1982-1986 | 912 |
| 1981 | 1003 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1003 |
| ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W. | 912 |