The Ford F-650 front turn signal requires a 3157NA or 1157 bulb size, while the rear turn signal uses a 3157 or 2057 bulb size. The replacement chart covers vehicle production spanning 2000 to 2022 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford F-650 front turn signal uses the 3157NA bulb for model years 2017-2019 and 2021-2022, while earlier model years 2000-2003 use the 1157 bulb instead.
The 3157NA is a dual-filament T25 wedge bulb rated at 12V with a 27W high-filament and 7W low-filament draw. Its natural amber glass produces a yellow-orange light output without requiring a colored lens or housing to achieve the amber turn signal color.
The 3157 bulb used in the rear turn signal position for 2017-2019 and 2021-2022 shares the same T25 wedge form factor and 12V, 27W/7W electrical ratings as the 3157NA, differing only in that it has clear rather than amber-tinted glass.
Because the 3157NA and 3157 share the same physical base and electrical ratings, they are mechanically interchangeable, though substituting a clear 3157 in a front position originally specified for the 3157NA would alter the color output of the turn signal.
The Ford F-650 rear turn signal for model years 2000-2003 uses the 2057 bulb, which carries a BAY15d bayonet base and is rated at 12V, 26.9W/8W. The 2057 is a brighter variant of the 1157 and is not a direct drop-in replacement for the T25 wedge-based 3157 used in later model years.
The 1157 front turn signal bulb used in the 2000-2003 F-650 also uses a BAY15d bayonet base and operates at 12V with a 21W/5W dual-filament configuration, making it electrically distinct from the 3157NA used in later model years.
All four bulb types across these specifications conform to ANSI standards recognized in both the United States and Canada, indicating consistent regulatory compliance across the listed model years.
The shift from BAY15d bayonet-base bulbs in the 2000-2003 F-650 to T25 wedge-base bulbs in the 2017-2022 model years reflects a change in socket type between generations, meaning bulbs from the earlier and later groups are not physically interchangeable.