Ford Falcon Dome Light Bulb Size

The Ford Falcon dome light utilizes 105 and 1003 bulb sizes for the interior illumination system. Provided information covers the specific time period from 1960 through 1970.

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
1970	105
1960-1969	1003

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	105
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003

Other Locations

Additional Notes

The 1003 bulb is the dominant dome light specification for the Ford Falcon, covering model years 1960-1969.
The 1003 is an ANSI-standard single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base.
The 1970 Ford Falcon dome light uses the 105 bulb, which differs from the 1003 used across all prior model years in these specifications.
The 105 is an ANSI-standard single-filament bulb rated at 12V and 13W, also fitted with a BA15s bayonet base.
Although both the 1003 and 105 share the BA15s bayonet base, their wattage ratings differ significantly, at 21W and 13W respectively, which makes them non-interchangeable despite the physical base compatibility.
The BA15s designation indicates a single-contact bayonet base with a 15mm collar, a common automotive base type used across many interior lighting applications.