American Motors Rambler Dome Light Bulb Size

The American Motors Rambler dome light requires bulb size 1003 or 1004 depending on the specific application. Data for the bulb sizes covers the range from 1958 to 1969.

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
1969	1004
1960	1004
1958-1959	1003

Bulb Specifications

Description	Bulb Size
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, 21W.	1003

Other Locations

Additional Notes

The American Motors Rambler dome light specifications cover model years 1958-1960 and 1969, with two distinct bulb types used across those years.
The 1003 bulb is specified for the 1958-1959 Rambler dome light. It is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base under the ANSI standard used in the US and Canada.
The 1004 bulb is specified for the 1960 and 1969 Rambler dome light. It is a dual-filament bulb rated at 12V with a 21/5W output, fitted with a BAY15d bayonet base under the same ANSI standard.
The BA15s base of the 1003 and the BAY15d base of the 1004 are physically distinct bayonet mount types. The BA15s is a single-contact base, while the BAY15d is an offset dual-contact base, making the two bulbs non-interchangeable.
The 1004 is a variant of the 1157 bulb. The 1157 is a widely used automotive bulb, and the 1004 shares its dual-filament, BAY15d configuration while operating within the same 12V electrical system.
The shift from the 1003 to the 1004 between the 1959 and 1960 Rambler represents a change from a single-filament to a dual-filament dome light bulb, along with a corresponding change in base type.