Freightliner FL112 Roof Marker Bulb Size

The Freightliner FL112 roof marker utilizes a 194 bulb size for the lighting component located on the exterior top of the vehicle cab. Available information covers the specific time span from 1996 through 2003 for the mentioned truck series.

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
1996-2003	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The 194 bulb is the sole roof marker bulb size specified for the Freightliner FL112 across all listed model years, spanning 1996-2003.
The 194 bulb conforms to ANSI standards recognized in both the United States and Canada, placing it within a regulated specification framework for miniature lighting applications.
It is classified as a T10 miniature wedge bulb, a designation that refers to its tubular glass envelope measuring 10 eighths of an inch in width and its wedge-shaped base, which seats directly into a socket without a separate metal base or pins.
The 194 operates at 12 volts, consistent with the standard electrical system voltage found in commercial vehicles of this type.
Its rated wattage of 3.78W places it in the low-power range typical of marker and clearance lighting, where continuous operation is expected and heat output is a practical consideration.
The wedge base design of the T10 format is shared across numerous 194-compatible variants, though wattage and voltage ratings must match the original specification to avoid socket damage or premature failure.