Ford F-600 Back Up Light Bulb Size

The Ford F-600 back up light utilizes bulb sizes 1156 and 199 according to the provided specifications for the vehicle. Data for the components covers the range from 1970 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
1977-1994	1156
1976	199
1972-1975	1156
1971	199
1970	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-600 back up light specifications cover model years 1970-1994.
Two bulb sizes are specified across these years: the 1156 and the 199, both of which are ANSI standards recognized in the US and Canada.
The 1156 is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base. This single-contact bayonet fitting is a common base type in North American automotive lighting applications.
The 199 shares the same BA15s bayonet base, voltage, and wattage ratings as the 1156 and is classified as a variant of it.
The 1156 is the dominant fitment across the Ford F-600 back up light specifications, covering the majority of the listed model years.
The 199 bulb is specified for the 1971 and 1976 model years only, while all other listed years use the 1156.
Because the 199 is a variant of the 1156 with identical electrical ratings and the same BA15s base, the two types share physical and electrical compatibility characteristics, though fitment should be confirmed against the specific model year before substitution.