Mercury Cyclone Parking Brake Indicator Bulb Size
The Mercury Cyclone parking brake indicator utilizes bulb sizes 194 and 257 for the lighting components. Data for the specific lighting requirements 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 |
|---|---|
| 1968-1971 | 194 |
| 1964-1967 | 257 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W. | 257 |