Ford F-650 License Plate Bulb Size

The Ford F-650 license plate light uses 3157 and 194 bulb sizes according to the provided specifications for the various lighting components. Data for the lighting requirements covers the range from 2000 to 2022.

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
2021-2022	3157
2017-2019	194
2000-2003	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The Ford F-650 license plate position uses two distinct bulb types across its model years: the 194 and the 3157, both of which conform to ANSI standards recognized in the United States and Canada.
The 194 bulb is a miniature wedge type with a T10 form factor, operating at 12V and drawing 3.78W. Its low wattage reflects its role as a small indicator or illumination source rather than a high-output lamp.
The 3157 bulb is a dual-filament wedge type with a T25 form factor, operating at 12V with a wattage rating of 27W on its primary filament and 7W on its secondary filament. The presence of two filaments means the bulb is capable of serving more than one lighting function within a single housing.
The Ford F-650 (2021-2022) uses the 3157 bulb for the license plate position.
The 194 bulb applies to the F-650 for the 2000-2003 and 2017-2019 model years in the license plate position.
The T25 and T10 designations refer to the outer width of the bulb envelope, with T25 being physically larger than T10. These two bulb types are not interchangeable due to differences in size, wattage, and filament configuration.
The shift from the 194 to the 3157 between the 2019 and 2021 model years represents a change in socket type and electrical draw, meaning housings designed for one bulb are incompatible with the other.