Cadillac Fleetwood Dome Light Bulb Size

Additional Notes

• The 562 bulb is the most frequently specified dome light bulb across the Cadillac Fleetwood's model history, covering the 1978-1979, 1981-1983, and 1989-1993 model years. It is a festoon-type bulb measuring 44mm in length with end-cap contacts, rated at 12V and 12W under the ANSI standard.
• The 212-2 bulb is the second most recurring specification, fitted to the Cadillac Fleetwood across the 1965-1970 and 1976 model years. Like the 214-2 and 211-2, it is a festoon bulb with an SV8.5 base and a 41mm length, rated at 12V and 12W.
• The 214-2, 211-2, and 212-2 bulbs share identical physical and electrical characteristics: all three are 41mm festoon bulbs with SV8.5 bases rated at 12V and 12W. Despite these shared specifications, they are listed as distinct ANSI part numbers and are not formally designated as interchangeable within these specifications.
• The 912 bulb, specified for the 1985-1988 model years, is a T15 wedge-type bulb rated at 12V and 12W. It is noted as a variant of the 921 bulb, meaning the 921 is a closely related part, though the specifications designate the 912 specifically for those years.
• The 1004 bulb, specified for the 1975, 1980, and 1984 model years, is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 21/5W. Its dual-filament design and wattage profile differ from all other dome light bulbs listed for the Fleetwood, as it is a variant of the 1157 bulb.
• The 161 bulb, specified solely for the 1971 model year, is a T10 miniature wedge bulb rated at just 12V and 1W. Its wattage is substantially lower than every other bulb type listed across the Fleetwood's dome light specifications.
• The 90 bulb, specified for the 1972-1973 model years, is a single-filament bulb with a BA15s bayonet base rated at 12V and 13W. The bayonet-style base of the 90 bulb is physically incompatible with the festoon and wedge sockets used in other Fleetwood model years.
• The transition from the 912 wedge bulb to the 562 festoon bulb between the 1988 and 1989 model years represents a socket-type change, as wedge and festoon bulbs use fundamentally different mounting mechanisms and are not interchangeable.
• The 1004 bulb's BAY15d bayonet base is an offset twin-contact fitting, which is physically distinct from the BA15s single-contact base of the 90 bulb. These two bayonet-base bulbs are not interchangeable despite both using bayonet-style mounting.
• Across the full span of Cadillac Fleetwood dome light specifications, six distinct bulb types are represented: the 562, 912, 1004, 214-2, 211-2, 212-2, 90, and 161. These span three base technologies, namely festoon, wedge, and bayonet, reflecting changes in socket design across different production eras.