Ford Fairmont Dome Light Bulb Size

The Ford Fairmont dome light requires bulb size 912, 906, or 211-2 depending on the specific vehicle configuration. Data for the bulb requirements covers the range from 1978 to 1983.

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
1983	912
1980-1982	906
1979	211-2
1978	906

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2

Other Locations

Additional Notes

The Ford Fairmont dome light draws from three distinct bulb types across its 1978-1983 model years: the 906, 912, and 211-2.
The 906 is the most frequently specified bulb in the Ford Fairmont dome light application, covering the 1978, 1980, 1981, and 1982 model years.
The 906 is an ANSI-standard miniature wedge bulb in a T10 form factor, rated at 12V and 8W.
The T10 wedge base is a push-in connector type that does not use a separate socket pin, relying instead on the bulb's glass envelope base to make electrical contact.
The 1983 Ford Fairmont uses the 912 bulb, a T15 wedge type rated at 12V and 12W, which draws more wattage than the 906 used in prior years.
The 912 is described as a variant of the 921 bulb. While the two share a T15 wedge base and 12V rating, they differ in wattage, making them not directly interchangeable in all applications.
The 1979 Ford Fairmont uses the 211-2, a festoon-style bulb with a 41mm length and an SV8.5 base, rated at 12V and 12W.
A festoon bulb is held in place by spring-loaded contacts at each end of the bulb rather than a wedge or bayonet base, making it physically incompatible with sockets designed for wedge-type bulbs.
All three bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.
The 906 and 912 share the same wedge base family but differ in body size and wattage, and substituting one for the other requires confirming socket fitment before installation.