Mercury Marauder Dome Light Bulb Size

The Mercury Marauder dome light utilizes bulb sizes 906, 105, 1003, and 1816 depending on the specific application. Data for the bulb sizes covers the range from 1963 to 2004.

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
2003-2004	906
1970	105
1968-1969	1003
1967	1816
1963-1966	1003

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	105
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1003
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816

Other Locations

Additional Notes

The Mercury Marauder dome light uses four distinct bulb types across its production years: the 906, 105, 1003, and 1816, all of which conform to ANSI standards recognized in both the United States and Canada.
The 1003 bulb is the most frequently specified type across the Mercury Marauder's dome light fitments, appearing in the 1963-1966 and 1968-1969 model years.
The 1003 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W, making it the highest-wattage dome light bulb in this set of specifications.
The Mercury Marauder (2003-2004) uses the 906, a T10 miniature wedge bulb rated at 12V and 8W. Its wedge base design means it requires no separate metal base, as the glass envelope itself acts as the retaining element.
The 906 and 1003 are not interchangeable. The 906 uses a wedge base while the 1003 uses a BA15s bayonet base, and the two differ significantly in wattage at 8W and 21W respectively.
The 1967 Marauder uses the 1816, a T3.25 miniature wedge bulb rated at 12V and 4W. At 4W, it is the lowest-wattage bulb specified across all listed model years.
The 1970 Marauder uses the 105, a single-filament bulb with a BA15s bayonet base rated at 12V and 13W. It is described as a variant of the 1156 bulb type.
Although the 105 and 1003 share the same BA15s bayonet base, their wattage ratings differ at 13W and 21W respectively, which means physical fitment alone does not confirm electrical interchangeability.
The 1816 wedge bulb used in the 1967 model year is not electrically equivalent to the 906 wedge bulb used in the 2003-2004 models, as the 1816 is rated at 4W compared to the 906 at 8W.