Mack R Instrument Panel Bulb Size
The Mack R instrument panel requires 3 distinct bulb sizes: 194, 57, and 161, with each size serving specific lighting functions on the dashboard. A replacement chart documents bulb specifications across the 1981 to 1991 production range for this vehicle model.
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 | 194 |
| 1990 | 57 |
| 1989 | 194 |
| 1988 | 161 |
| 1987 | 194 |
| 1986 | 161 |
| 1984-1985 | 194 |
| 1983 | 57 |
| 1982 | 161 |
| 1981 | 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 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W. | 161 |