Mercury Grand Marquis Check Engine Bulb Size
The Mercury Grand Marquis check engine light utilizes PC194 and 194 bulb sizes for the instrument cluster. Available information covers a production range from 1993 through 2005.
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 |
|---|---|
| 1998-2005 | PC194 |
| 1993-1997 | 194 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10) with printed circuit board twist-lock socket, for instrument clusters. 12V, 3.78W. | PC194 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |