Dodge 440 Back Up Light Bulb Size

The Dodge 440 back up light requires a 1073 bulb size for the specified lighting component. Available data for the requested bulb covers the range from 1963 to 1964.

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
1963-1964	1073

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073

Other Locations

Additional Notes

The 1073 bulb follows the ANSI standard recognized in both the United States and Canada, making it a widely standardized automotive component across North American vehicles.
The Dodge 440 used the 1073 bulb size for its back up light across the 1963-1964 model years.
The 1073 operates on a 12-volt electrical system and draws 13 watts, placing it within the range typical of incandescent automotive lighting applications.
The 1073 uses a BA15s bayonet base, which is a single-contact base type. The "s" in BA15s denotes a single contact pin, as opposed to the dual-contact BA15d variant, meaning the two are not interchangeable despite sharing the same base width.
The 1073 is a single-filament bulb, meaning it serves one lighting function only, which is consistent with its application as a back up light rather than a combination stop and tail light.
The 1073 is described as a lower wattage variant of the 1156. Both share the BA15s bayonet base, but the wattage difference means substituting one for the other may produce different light output levels and could affect circuit load.