Mack DM Instrument Panel Bulb Size

The Mack DM instrument panel requires 3 distinct bulb sizes: 161, 57, and 194, with each size serving specific lighting functions within the dashboard assembly. A replacement chart documents bulb size specifications across the 1981 to 1997 vehicle production range.

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

YearsBulb Size
1996-1997161
199557
1993-1994194
1992161
1991194
1990161
1989194
198857
1987194
198657
1983-1985194
1982161
1981194

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W.161
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.57
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.194

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