Ford C700 Back Up Light Bulb Size

The Ford C700 back up light requires a 1156 bulb size for proper installation and function. Available data for the specified component covers the period from 1980 through 1986.

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
1980-1986	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 C700 back up light uses the 1156 bulb across all listed model years, spanning 1980-1986.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail duties.
It operates on a 12-volt electrical system and draws 21 watts.
The 1156 follows the ANSI standard, which is the recognized specification framework used in both the United States and Canada.
The bulb uses a BA15s bayonet base, a single-contact mount where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d variant.
The BA15s base type is not interchangeable with dual-contact bayonet bases, so substituting a visually similar bulb with a BA15d base would result in an improper fit.