Mercury Marauder Map Light Bulb Size

The Mercury Marauder map light requires bulb sizes 168, 1816, 631, and 1895 depending on the specific application. Available 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	168
1968-1970	1816
1967	631
1966	1816
1963-1965	1895

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	631
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895

Other Locations

Additional Notes

The Mercury Marauder map light specifications span two distinct production eras: the early 1960s-1970s generation and a revived 2003-2004 generation, with four different bulb sizes specified across all model years.
The 168 bulb, a T10 miniature wedge type rated at 12V and 4.9W, is specified for the 2003-2004 Mercury Marauder map light.
The T10 wedge base is a push-in connector with no separate socket locking mechanism, relying on the tension of the housing to retain the bulb.
The 1816 bulb, a T3.25 miniature wedge type rated at 12V and 4W, is specified for the 1966, 1968, 1969, and 1970 Mercury Marauder map light.
The 1895 bulb, a T5 miniature wedge type rated at 12V and 0.9W, is specified for the 1963-1965 Mercury Marauder map light. At 0.9W, it draws notably less power than the other wedge bulbs listed in these specifications.
The 631 bulb is specified exclusively for the 1967 Mercury Marauder map light. Unlike the other bulbs in these specifications, it uses a BA15s bayonet base rather than a wedge base, making it physically incompatible with wedge-type sockets.
The 631 is noted as a variant of the 1156 bulb family and is rated at 12V and 21W, a significantly higher wattage than any other bulb listed in these specifications.
Because the 1967 model uses a bayonet-base bulb while adjacent model years use wedge-base bulbs, substitution between the 1967 fitment and those of 1966 or 1968 is not possible without a socket adapter.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating standardized electrical and physical tolerances across the listed sizes.
The three wedge-base bulbs specified across these model years (168, 1816, and 1895) share the same 12V operating voltage but differ in wattage and base size, meaning voltage compatibility alone does not establish interchangeability between them.