Mercury Cyclone Trunk Bulb Size
The Mercury Cyclone trunk light requires 631 and 1003 bulb sizes for the specific lighting components located inside the rear storage compartment. Available data for the specified vehicle covers the period from 1964 through 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 Size |
|---|---|
| 1969-1971 | 631 |
| 1968 | 1003 |
| 1964-1967 | 631 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| 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 |