Ford Fiesta Turn Signal Indicator Bulb Size

Ford Fiesta turn signal indicator bulb uses a 194 size. The replacement chart covers 1978 to 1980 production years with corresponding bulb 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
1978-1980	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 194 bulb is the sole turn signal indicator bulb size listed for the Ford Fiesta across the 1978-1980 model years.
The 194 is an ANSI-standardized bulb used in the United States and Canada, classified as a miniature wedge type in the T10 form factor.
The T10 wedge base design means the bulb is held in place by friction against the socket walls rather than by a bayonet or screw mechanism.
The 194 bulb operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage range typical of indicator and courtesy lighting applications.
Because the 194 follows ANSI standardization, it shares a defined specification with other bulbs in the same series, which governs its electrical and physical characteristics across manufacturers.
The T10 wedge format is widely used in instrument panel and indicator roles, and the 194 specifically falls within that category rather than the higher-wattage wedge types used for exterior lighting such as brake or reverse lamps.