Ford F-8000 License Plate Bulb Size

The Ford F-8000 license plate light requires a 1157 bulb size for proper installation and function within the rear exterior lighting assembly. Data for the specified vehicle covers the range from 1983 to 1987.

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
1987	1157
1983-1984	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 1157 is the license plate bulb size for the Ford F-8000 across the 1983-1987 model years represented in the specifications.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, each rated at a different wattage.
The bulb operates on a 12-volt electrical system, with filaments rated at 21 watts and 5 watts respectively.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by positioning the pins at different heights along the base.
The 1157 is classified under ANSI standards and is recognized for use in both the United States and Canada, reflecting a shared North American standardization framework.
Because the 1157 is a dual-filament type, substituting it with a single-filament equivalent such as the 1156 would result in an incomplete circuit for one of the two filament functions.