Ford B-800F Back Up Light Bulb Size

The Ford B-800F back up light requires a 1156 bulb size for proper installation and function. Data for the specific component covers the range from 1995 to 1998.

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
1995-1998	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-800F uses the 1156 bulb for the back up light across the 1995-1998 model years.
The 1156 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical characteristics shared by all compliant manufacturers.
The 1156 operates at 12 volts and 21 watts, which places it in the range typical of single-filament automotive signal and reverse lighting applications.
As a single-filament bulb, the 1156 serves only one lighting function per socket, distinguishing it from dual-filament types such as the 1157, which handle two functions from a single housing.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width. The single-contact design is directly tied to its single-filament construction.
The BA15s base is not interchangeable with the BA15d base found on dual-filament bulbs. Substituting a dual-contact bulb into a single-contact socket is not mechanically compatible.