Ford F-700 Back Up Light Bulb Size

The Ford F-700 back up light utilizes bulb sizes 1156 and 199 depending on the specific production period for the vehicle. Information provided covers the range from 1970 through 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
1976-1998	1156
1972-1975	199
1970-1971	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199

Other Locations

Additional Notes

The Ford F-700 back up light uses the 1156 bulb for model years 1970-1973, 1976-1998, and the 199 bulb for model years 1972-1975.
Both the 1156 and 199 are ANSI-standardized bulb types recognized in the United States and Canada.
Each bulb type operates at 12 volts with a 21-watt output, placing them in the standard single-filament automotive lighting range.
Both bulb types use a BA15s bayonet base, a single-contact base design where the bulb locks into its socket with a quarter-turn motion.
The 199 is classified as a variant of the 1156, meaning the two share the same base type, voltage, and wattage ratings.
Despite their technical similarities, the 1156 and 199 are listed as distinct bulb sizes across different model years of the Ford F-700, indicating that substitution between the two warrants verification before installation.