The Ford F-650 brake light utilizes 3157 and 2057 bulb sizes depending on the specific application. Available data for the lighting components covers the period from 2000 to 2022.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford F-650 brake light specifications reference two distinct dual-filament bulb types across different model years: the 3157 and the 2057. Both operate on a 12V system and are rated under ANSI standards applicable in the US and Canada.
The 3157 is a dual-filament wedge bulb in the T25 form factor, rated at 27W on the high-intensity filament and 7W on the low-intensity filament. This wattage split allows it to serve both brake and running light functions within a single housing.
The 2057 uses a BAY15d bayonet base rather than a wedge mount, which makes it physically incompatible with sockets designed for the 3157 despite both being dual-filament 12V bulbs. The 2057 is rated at 26.9W and 8W across its two filaments.
The 2057 is described as a brighter variant of the 1157. While the two share the same BAY15d base and are often considered interchangeable, the 2057 produces greater output on its high-intensity filament.
The Ford F-650 uses the 3157 for brake lighting across the 2017-2019 and 2021-2022 model years, while the 2000-2003 model years use the 2057. The socket type differs between these two generations, so the bulbs are not interchangeable without a socket adapter or modification.
The 912 is a single-filament wedge bulb in the T15 form factor, rated at 12W. As a single-filament type, it is suited only for on/off applications such as the Center High Mount Stop Light, rather than dual-function brake and running light circuits.
The 912 is a variant of the 921 bulb. Both share the T15 wedge base and are electrically similar, though wattage ratings can vary slightly between specific part numbers in that family.
The Center High Mount Stop Light on the Ford F-650 uses the 912 bulb for the 2017-2019 model years. This is a separate specification from the main brake bulb used in those same years.