Cadillac Eldorado Map Light Bulb Size

The Cadillac Eldorado map light utilizes bulb sizes 168, 906, 562, 1004, 89, 90, and 212-2 depending on the specific production period. Available data for the lighting components spans from 1953 through 2002.

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
1992-2002	168
1991	906
1990	562
1989	906
1982-1988	1004
1981	562
1980	1004
1974-1979	562
1967-1971	89
1965-1966	90
1962-1964	212-2
1953-1960	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	562
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004
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. 12V, 13W.	90
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2

Other Locations

Additional Notes

The Cadillac Eldorado map light uses the 168 bulb across its longest continuous span, covering model years 1992-2002. The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, making it among the lower-wattage types found in these specifications.
The 1004 bulb appears in the Cadillac Eldorado map light position for 1982-1988, as well as the 1980 model year. It carries a BAY15d bayonet base and a dual-filament design rated at 12V and 21/5W, which is notably higher in wattage than most other bulb types listed for this position.
The 562 festoon bulb is specified for 1974-1979, 1981, and 1990. At 44mm in length with end-cap contacts, it is physically distinct from both wedge and bayonet-base types and operates at 12V and 12W.
The 906 bulb, a T10 miniature wedge type rated at 12V and 8W, is specified for the 1989 and 1991 model years. Although it shares the T10 wedge form factor with the 168 bulb, its wattage is higher, and the two are not the same part despite physical similarities.
The 90 bulb, a single-filament BA15s bayonet type rated at 12V and 13W, is specified across 1953-1960 and 1965-1966, representing the dominant bulb type for the earliest model years in these specifications.
The 89 bulb shares the BA15s bayonet base and 12V, 13W rating with the 90 bulb and is described as a lower-wattage variant of the 1156. It is specified for 1967-1971. Despite the functional similarity between the 89 and 90, the specifications treat them as distinct part numbers and they are not listed as interchangeable.
The 212-2 festoon bulb, specified for the 1962-1964 Eldorado, uses an SV8.5 base and measures 41mm in length. This distinguishes it from the 562 festoon type, which uses end-cap contacts and a 44mm length, meaning the two festoon bulbs are not interchangeable despite sharing a similar form category.
The 1004 bulb is described as a variant of the 1157, which itself is a widely used dual-filament automotive bulb. However, the 1004 and 1157 are not the same part, and substitution between them would require verification of base and filament compatibility.
Both the 168 and 906 bulbs use the T10 wedge base, but their wattage ratings differ at 4.9W and 8W respectively. This means a direct substitution between the two, while physically possible in some fixtures, would alter the power draw of the circuit.
Across the full span of these specifications, the Cadillac Eldorado map light position reflects six distinct bulb types: 90, 89, 212-2, 562, 1004, 906, and 168. This range spans both festoon and bayonet base designs as well as wedge types, indicating that no single bulb family covers the entire production history of this model in this position.