Ford F-8000 Back Up Light Bulb Size

The Ford F-8000 back up light requires a bulb size of 1156 for the specified lighting component. Data for the provided bulb specifications 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	1156
1983-1984	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

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Additional Notes

The 1156 is the sole bulb type listed across all model years in these specifications for the Ford F-8000 back up light. It is an ANSI-standardized bulb recognized in both the United States and Canada.
The 1156 bulb operates on a 12-volt electrical system and draws 21 watts, which is typical for single-filament automotive signal and reverse lighting applications.
As a single-filament bulb, the 1156 serves one lighting function only, distinguishing it from dual-filament types that handle two functions such as braking and running light simultaneously.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width. This base type requires a quarter-turn insertion rather than a screw-in motion.
The Ford F-8000 back up light specifications cover the 1983-1984 and 1987 model years, all calling for the same 1156 bulb size.
Because the BA15s base is a standardized fitting, the 1156 bulb is produced by multiple manufacturers, though any replacement must match the 12V and 21W ratings to maintain correct electrical compatibility with the Ford F-8000.