Pontiac T1000 License Plate Bulb Size

The Pontiac T1000 license plate light requires a 194 bulb size for proper illumination of the rear registration area. Data for the specified component covers the period from 1981 through 1987.

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
1981-1987	194

Bulb Specifications

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

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Additional Notes

The Pontiac T1000 uses the 194 bulb for the license plate across all listed model years, spanning 1981-1987.
The 194 is classified as a miniature wedge bulb, designated T10 in the international bulb sizing system, where "T" refers to the tubular shape and "10" indicates the width in eighths of an inch.
The wedge base design means the bulb is held in place by the socket gripping the glass envelope directly, with no separate metal base or pins involved.
The 194 bulb operates at 12 volts, which is consistent with the standard electrical system voltage found in conventional passenger vehicles.
The rated wattage of 3.78W places the 194 in the low-power category, reflecting its role in a non-safety-critical illumination function such as license plate lighting.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning the specification conforms to a defined and regulated technical standard across North American markets.
The T10 wedge form factor is shared by several bulb numbers beyond the 194, and substitution between them is not always interchangeable due to differences in wattage or voltage ratings even when the physical fit is similar.