Ford C600 Back Up Light Bulb Size

The Ford C600 back up light requires a single 1156 bulb size for proper installation and function within the rear lighting assembly. Available data for the specified vehicle covers a range 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 C600 back up light bulb specification calls for the 1156 across all listed model years, spanning 1980-1986.
The 1156 is an ANSI-standardized bulb type recognized in both the United States and Canada.
It operates on a 12-volt electrical system and draws 21 watts, which is typical for incandescent automotive signal and reverse lighting applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin rather than the dual-pin BA15d variant, making the two types non-interchangeable despite sharing the same base width.
As a single-filament bulb, the 1156 serves one lighting function only, which is consistent with its use in a dedicated back up light circuit rather than a combined stop/tail application.