Ford C600 License Plate Bulb Size

The Ford C600 license plate light requires a 1157 bulb size for proper installation and function. Available data for the specified lighting component covers the period from 1980 through 1986.

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
1980-1986	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The Ford C600 uses the 1157 bulb for its license plate position across the 1980-1986 model years.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, rated at 21W and 5W respectively.
The bulb operates on a 12-volt electrical system, consistent with standard automotive DC voltage.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by positioning the pins at different heights.
The 1157 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary one.
Because the 1157 is a dual-filament type, substituting it with a single-filament equivalent such as the 1156 would not be a direct replacement, as the base pin configuration and wattage ratings differ.