Mack RB Instrument Panel Bulb Size
The Mack RB instrument panel utilizes 2 bulb sizes: 194 and 57, with each size serving specific lighting functions within the dashboard assembly. The replacement chart covers vehicle production spanning 1989 to 1997, detailing bulb specifications across this 8-year period.
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 |
|---|---|
| 1991-1997 | 194 |
| 1990 | 57 |
| 1989 | 194 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W. | 57 |