Cadillac Cimarron Map Light Bulb Size

The Cadillac Cimarron map light bulb uses 3 different sizes: 194, 1004, and 90. A replacement chart documents bulb specifications across the 1982 to 1986 production years.

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
1986	194
1984	1004
1982	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
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. 12V, 13W.	90

Other Locations

Additional Notes

The Cadillac Cimarron map light draws from three distinct ANSI-standard bulb types across its model years, each with a different base type and wattage rating.
The 194 bulb, used in the 1986 Cadillac Cimarron, is a T10 miniature wedge type rated at 12V and 3.78W. The wedge base design means it is held in place by the socket itself rather than by a locking mechanism.
The 1004 bulb, specified for the 1984 model, uses a BAY15d bayonet base and carries a dual-filament design rated at 12V with a 21/5W output. The dual-wattage rating reflects its two filaments, each serving a separate function.
The 1004 is noted as a variant of the 1157, a widely referenced automotive bulb. Despite this relationship, the two are not identical and are not confirmed as interchangeable in these specifications.
The 90 bulb, fitted to the 1982 model, uses a BA15s bayonet base with a single filament rated at 12V and 13W. The BA15s base accepts only single-filament bulbs, making it physically incompatible with dual-filament types such as the 1004.
All three bulb types carry ANSI designations valid in both the United States and Canada, indicating standardized electrical and physical tolerances within those markets.
The base types across the three years are entirely different: wedge (194), BAY15d (1004), and BA15s (90). This means none of the three bulbs is a drop-in substitute for another.
The wattage values range from 3.78W for the 194 to 13W for the 90, reflecting a notable difference in power draw between model years for the same map light position.