The Ford F-750 parking light requires a bulb size of 1157 for the lighting system. Data for the specified component covers the range from 2000 to 2003.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford F-750 front parking light position uses two distinct bulb types across its model years: the 3157NA for 2017-2019 and 2021-2022, and the 1157 for 2000-2003.
The 3157NA is a dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W high filament and 7W low filament, and features natural amber glass that produces an amber output without the use of a colored lens or housing.
The 1157 is a dual-filament bulb rated at 12V with a 21W high filament and 5W low filament, and uses a BAY15d bayonet base, which is a two-pin offset bayonet mount designed to prevent incorrect installation orientation.
Both the 3157NA and 1157 conform to ANSI standards recognized in the United States and Canada, meaning each bulb meets defined performance and dimensional criteria within those markets.
The 3157NA and 1157 are not interchangeable. The 3157NA uses a wedge-style base while the 1157 uses a BAY15d bayonet base, making the two physically incompatible with each other's sockets.
The natural amber glass of the 3157NA distinguishes it from the standard 3157, which has clear glass. Substituting a clear 3157 in place of a 3157NA would alter the color output at the lens.
The dual-filament design of both bulb types indicates that each serves a combined function within the front parking light assembly, operating at different wattages depending on the active circuit.
The 3157NA carries a higher wattage on its primary filament (27W) compared to the 1157 (21W), reflecting a difference in light output between the two generations of F-750 front parking light specifications.