Ford Fiesta Automatic Transmission Indicator Bulb Size

Ford Fiesta automatic transmission indicator bulb uses a 194 size bulb for this component. The replacement chart covers 1979 to 1980 production years with corresponding bulb size specifications.

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
1979-1980	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 T10 miniature wedge is the bulb type used for the automatic transmission indicator in the Ford Fiesta across the listed model years. It operates at 12 volts with a power draw of 3.78 watts.
The 194 designation follows the ANSI standard classification system used in the United States and Canada, meaning it conforms to a standardized set of electrical and physical specifications recognized across North American automotive applications.
The Ford Fiesta (1979-1980) uses the 194 bulb size for its automatic transmission indicator. The T10 wedge base format means the bulb is retained by friction rather than a bayonet or screw mechanism, requiring a compatible wedge-type socket for proper fitment.