Ford Del Rio Wagon Back Up Light Bulb Size

The Ford Del Rio Wagon back up light requires a bulb size of 1141 for the rear lighting assembly. Data for the specified vehicle covers the range from 1957 to 1958.

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
1957-1958	1141

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1141

Other Locations

Additional Notes

The 1141 is the sole bulb type listed for the Ford Del Rio Wagon backup light across both available model years, 1957-1958.
The 1141 follows the ANSI standard, meaning it conforms to a standardized specification recognized across the United States and Canada.
The 1141 operates on a 12-volt electrical system and draws 21 watts, which reflects a single-filament design typical of dedicated backup light applications where only one lighting function is needed from the bulb.
The 1141 uses a BA15s bayonet base, a single-contact mount where the "s" denotes a single pin, as opposed to the double-contact BA15d variant. These two base types are not interchangeable despite sharing the same physical bayonet collar size.