Mercury Cyclone Map Light Bulb Size
Mercury Cyclone map light bulb sizes include 1816, 631, and 57 specifications. The replacement chart covers vehicle production years spanning 1964 to 1971.
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 Type | Shop |
|---|---|---|
| 1970-1971 | 1816 | Check Price |
| 1969 | 631 | Check Price |
| 1968 | 1816 | Check Price |
| 1967 | 57 | Check Price |
| 1966 | 1816 | Check Price |
| 1964-1965 | 257 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W. | 1816 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W. | 631 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W. | 57 | Check Price |
| ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W. | 257 | Check Price |