Ford Thunderbird Map Light Bulb Size

The Ford Thunderbird map light utilizes unique bulb sizes 6411, 105, 168, 912, 211-2, 212-2, 1003, 1816, 631, 89, 67, and 63. Available data covers the range from 1955 to 2005.

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
2004-2005	211-2
1994-1997	105
1990-1993	168
1986-1989	105
1985	912
1983-1984	105
1982	912
1981	105
1980	912
1977-1979	211-2
1973-1976	1003
1969-1972	211-2
1968	1816
1963-1967	631
1958-1962	89
1956-1957	67
1955	63

Bulb Specifications

Description	Bulb Size
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. Variant of 1156. 12V, 13W.	105
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	631
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

Other Locations

Additional Notes

The Ford Thunderbird map light specifications span model years 1955 through 2005, drawing on ten distinct bulb sizes across that period.
The 211-2 is the most frequently recurring bulb in these specifications, appearing across the 1969-1972, 1977-1979, 2004, and 2005 model years. It is a festoon-type bulb with an SV8.5 base, a 41mm length, and operates at 12V, 12W.
The bulb size 105 is the second most common fitment, covering the 1981, 1983-1984, 1986-1989, and 1994-1997 model years. It is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and is classified as a variant of the 1156.
The BA15s bayonet base is shared by several bulbs in these specifications, including the 105, 1003, 631, 89, and 67. Despite this shared base type, these bulbs differ in wattage, ranging from 8W for the 67 up to 21W for the 1003 and 631, which means they are not interchangeable without accounting for those electrical differences.
The 1003, used on the Ford Thunderbird for the 1973-1976 model years, carries a 21W rating, making it the highest-wattage BA15s fitment in these specifications. The 631, also rated at 21W with a BA15s base, was the specified fitment for the 1963-1967 model years.
The 168 bulb, specified for the 1990-1993 model years, is a T10 miniature wedge type operating at 12V and 4.9W. Its low wattage places it among the least power-intensive fitments in these specifications.
The 912 wedge bulb, a T15 type and a variant of the 921, was specified for the 1980, 1982, and 1985 model years. It operates at 12V and 12W.
The 1816, specified for the 1968 Ford Thunderbird, is a T3.25 miniature wedge bulb rated at 12V and 4W. It is among the lowest-wattage fitments across the entire model range covered by these specifications.
The 89 bulb, covering the 1958-1962 model years, shares the BA15s bayonet base with the 105 and is also described as a lower-wattage variant of the 1156, rated at 12V and 13W. Despite the same wattage rating as the 105, the two are listed as separate ANSI bulb sizes and are not confirmed as interchangeable within these specifications.
The 63 bulb, specified for the 1955 Ford Thunderbird, is the only fitment in these specifications using a BA9s base rather than a BA15s or wedge-type base. At 12V and 0.63W, it is also the lowest-wattage bulb across the entire range covered here.