Ford B-700 Back Up Light Bulb Size

The Ford B-700 back up light utilizes a single 1156 bulb size for illumination across all listed vehicle applications. Data for the specific component covers a continuous range from 1980 through 1994.

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
1980-1994	1156

Bulb Specifications

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

Other Locations

Additional Notes

The Ford B-700 uses the 1156 bulb size for the back up light across all listed model years from 1980 to 1994.
The 1156 is an ANSI-standardized bulb type recognized in both the United States and Canada.
This bulb operates on a 12-volt electrical system and draws 21 watts.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than switching between two brightness levels.
It uses a BA15s bayonet base, which is a single-contact bayonet mount that locks into the socket with a twist.
The BA15s base is not interchangeable with the BA15d base, which is a dual-contact variant used in two-filament bulbs such as the 1157.