Freightliner XB Line Instrument Panel Bulb Size

The Freightliner XB Line instrument panel utilizes bulb size 193 and bulb size 97 for illumination. Data for the specific components covers the range from 1995 through 1997.

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
1996-1997	193
1995	97

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	193
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	97

Other Locations

Additional Notes

The 193 bulb is the instrument panel bulb used in the Freightliner XB Line for the 1996-1997 model years. It follows the ANSI standard recognized in both the United States and Canada.
The 193 is a T10 miniature wedge bulb, meaning it uses a wedge-shaped base that friction-fits directly into a socket without a separate locking mechanism. It operates at 12 volts and draws 3.78 watts, placing it among the lower-wattage bulbs used in instrument panel applications.
The 1995 Freightliner XB Line uses a 97 bulb for the instrument panel, which differs significantly from the 193 used in the two subsequent years. The 97 operates at 12 volts but draws 13 watts, a substantially higher wattage than the 193.
The 97 bulb uses a BA15s single-contact bayonet base, a twist-and-lock style mount that is physically incompatible with the wedge socket used by the 193. These two bulb types are not interchangeable despite sharing the same 12-volt operating voltage.
The 97 bulb is a single-filament type and is classified as a variant of the 1156, a widely used automotive bulb. While related in design, the 97 and 1156 are not identical and may differ in wattage or base configuration depending on the application.