Mercury Caliente Courtesy Bulb Size
Mercury Caliente courtesy bulb specifications include 1816, 631, and 1003 bulb sizes for vehicles produced during the stated period. The replacement chart documents bulb size data spanning 1964 to 1967.
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 |
|---|---|
| 1967 | 1816 |
| 1966 | 631 |
| 1965 | 1003 |
| 1964 | 631 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| 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). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1003 |