Lincoln Capri Dome Light Bulb Size

The Lincoln Capri dome light requires bulb size 1003 or 63 depending on the specific application. Data for the bulb sizes covers the range from 1952 through 1959.

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
1956-1959	1003
1952-1955	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

Other Locations

Additional Notes

The Lincoln Capri dome light specifications cover model years 1952 through 1959, split across two distinct bulb types depending on the production era.
The 1952-1955 Lincoln Capri uses the ANSI 63 bulb for the dome light, while the 1956-1959 Lincoln Capri uses the ANSI 1003 bulb.
Both the 1003 and 63 are ANSI-standardized bulbs recognized in the US and Canadian markets.
The 1003 bulb operates at 12 volts with a 21-watt output and uses a BA15s bayonet base, which is a single-contact bayonet fitting.
The 63 bulb also operates at 12 volts but draws only 0.63 watts, making it a significantly lower-output lamp than the 1003.
Both bulbs are single-filament designs, meaning neither supports dual-intensity functions such as combined stop and tail operation.
The BA15s base on the 1003 and the BA9s base on the 63 are physically incompatible with each other, so the two bulb types are not interchangeable across the 1952-1955 and 1956-1959 model years.
The BA9s base used by the 63 bulb is a miniature bayonet fitting, smaller than the BA15s, and is typically associated with low-current indicator and courtesy light applications.