Isuzu Impulse License Plate Bulb Size

The Isuzu Impulse license plate light requires a 194 bulb size for proper illumination of the rear vehicle identification area. Data for the specified lighting component covers the period from 1983 to 1992.

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
1983-1992	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The Isuzu Impulse uses the 194 bulb size for the license plate position across all listed model years, spanning 1983-1992.
The 194 is a miniature wedge-base bulb in the T10 form factor, operating at 12 volts with a power draw of 3.78 watts.
The T10 designation refers to the bulb's tubular shape, with the number indicating its width in eighths of an inch, making it a relatively small wedge-type lamp.
The 194 bulb conforms to ANSI standards recognized in both the United States and Canada, placing it within a widely standardized specification for low-voltage automotive lighting.
The wedge base design of the 194 means it is held in its socket by the tension of the base contacts rather than by a bayonet or screw mechanism, which is a common trait in license plate and interior lighting applications.
At 3.78 watts, the 194 operates at a low wattage consistent with its role as an illumination bulb rather than a signaling lamp, where higher intensity output is not required.