Ford Del Rio Wagon Dome Light Bulb Size

The Ford Del Rio Wagon dome light requires a 1003 bulb size for proper illumination inside the vehicle cabin. Data for the specific component 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	1003

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003

Other Locations

Additional Notes

The 1003 is an ANSI-standardized bulb used in the United States and Canada, operating at 12 volts with a 21-watt output through a single filament.
The 1003 bulb uses a BA15s bayonet base, which is a single-contact bayonet mount with a 15mm base width.
The Ford Del Rio Wagon used the 1003 bulb size for its dome light across the 1957-1958 model years.
The single-filament design of the 1003 means it serves one lighting function only, with no secondary filament for a reduced-brightness mode.
The BA15s designation indicates a single-contact base, distinguishing it from the dual-contact BA15d variant, which is not interchangeable with the 1003.