Cadillac Eldorado Dome Light Bulb Size

Additional Notes

• The Cadillac Eldorado dome light draws from eight distinct bulb types across its production span, with the 1004 type appearing most frequently, covering the 1953-1957, 1960, 1963-1964, and 1975 model years.
• The bulb 90 is the second most recurring type in these specifications, fitted across the 1958-1959, 1961-1962, 1972-1973, 1984-1986 model years, and operates as a single-filament BA15s bayonet base bulb at 12V and 13W.
• The 212-2 festoon bulb, rated at 12V and 12W with an SV8.5 base and 41mm length, was used across the 1965-1970 and 1976-1977 model years, making it one of the longer-running fitments in the Eldorado dome light history.
• The 1004 bulb carries a dual-filament BAY15d bayonet base and is rated at 12V with a 21/5W output, classifying it as a variant of the widely known 1157 type. Its dual-filament design is a notable characteristic relative to the single-filament bulbs used in other Eldorado model years.
• The 562 festoon bulb, used in the 1978-1982 and 1991 model years, measures 44mm in length with end-cap contacts and is rated at 12V and 12W. It differs physically from the 212-2 festoon type, which uses an SV8.5 base rather than end-cap contacts, making the two types non-interchangeable despite similar voltage and wattage ratings.
• The 912 wedge bulb, fitted to the Cadillac Eldorado for the 1987-1988 model years, is a T15 type rated at 12V and 12W and is described as a variant of the 921 bulb. The T15 form factor is physically larger than the T10 wedge types used in other Eldorado model years.
• Three separate T10 wedge bulb types appear across the specifications: the 161 at 1W, the 168 at 4.9W, and the 906 at 8W, all rated at 12V. Despite sharing the same T10 form factor, their wattage ratings differ substantially, and substituting one for another would alter the light output in the dome application.
• The 161 bulb, used solely in the 1971 model year, carries the lowest wattage of any bulb in these specifications at 12V and 1W. Its T10 wedge form is shared with the 168 and 906 types, but its significantly lower wattage distinguishes it from those fitments.
• The 1992 model year uses the 168 wedge bulb at 4.9W, which represents a lower wattage than the 906 used in 1989-1990 at 8W and the 912 used in 1987-1988 at 12W, reflecting a pattern of decreasing wattage in the dome light fitment across those final production years.
• All bulb types listed in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating that fitment sourcing is not regionally restricted between those two markets.