Lincoln Mark V Map Light Bulb Size

Lincoln Mark V map light bulb utilizes 1003 and 211-2 size bulbs for interior illumination. Replacement chart data covers 1977 to 1979 vehicle production specifications.

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
1979	1003
1977-1978	211-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2

Other Locations

Additional Notes

The Lincoln Mark V uses two distinct bulb types across its model years for the map light: the 1003 and the 211-2, both of which conform to ANSI standards recognized in the United States and Canada.
The 1003 bulb is a single-filament type with a BA15s bayonet base, rated at 12V and 21W. The BA15s designation indicates a single-contact bayonet cap with a 15mm base width.
The 211-2 is a festoon bulb with an SV8.5 base and a length of 41mm, rated at 12V and 12W. Festoon bulbs are cylindrical in form and mount by contact pressure at each end rather than by a socket base.
The 1003 draws 21W, while the 211-2 draws 12W. These two bulbs are not interchangeable due to differences in base type, physical form, and wattage.
The 1979 Lincoln Mark V map light takes the 1003 bulb, which uses a bayonet-style mounting mechanism distinct from the festoon format used in earlier model years.
The 1977-1978 Mark V map light takes the 211-2 festoon bulb. The SV8.5 base designation refers to a festoon cap style with an 8.5mm contact width.