Ford LTD Map Light Bulb Size

The Ford LTD Map Light utilizes unique bulb sizes 912, 105, 211-2, 1003, 214-2, and 631 depending on the specific vehicle configuration. Available data covers the range from 1965 through 1986.

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
1986	912
1980-1985	105
1978-1979	211-2
1974-1977	1003
1973	214-2
1967-1970	631
1965-1966	1003

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	105
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
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.	214-2
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	631

Other Locations

Additional Notes

The Ford LTD map light specifications span model years 1965 through 1986, with six distinct bulb types used across that period: the 912, 105, 211-2, 1003, 214-2, and 631.
The 1003 bulb is the most frequently specified type across the Ford LTD map light fitments, appearing in the 1965-1966 and 1974-1977 model years. It is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W.
The 105 bulb is the second most common type, covering the 1980-1985 model years. It is also a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and is classified as a variant of the 1156.
The 631 bulb, specified for the 1967-1970 model years, shares the BA15s bayonet base and single-filament construction with the 1003, and is likewise rated at 21W. It is also classified as a variant of the 1156.
The 105 and 1003 bulbs share the same BA15s bayonet base type, but they are not interchangeable due to their differing wattage ratings of 13W and 21W respectively.
The 211-2 and 214-2 are both festoon bulbs with a 41mm length and SV8.5 base, each rated at 12V and 12W. The 211-2 is specified for the 1978-1979 model years, while the 214-2 is specified for 1973.
Because the 211-2 and 214-2 share identical physical and electrical specifications, they are generally considered interchangeable in practice, though they carry distinct ANSI designations.
The 912 bulb, specified exclusively for the 1986 Ford LTD, is a wedge-type bulb with a T15 form factor, rated at 12V and 12W. It is classified as a variant of the 921 and is not physically compatible with the BA15s bayonet or SV8.5 festoon bases used in earlier model years.
The shift from BA15s bayonet-based bulbs in the 1965-1966 and 1974-1977 periods to festoon-type bulbs in 1973 and 1978-1979, and then to a wedge-type bulb in 1986, reflects changes in the map light socket design across different LTD generations.
All six bulb types in these specifications conform to ANSI standards applicable to the United States and Canada, and all operate on a 12V electrical system.