Ford F-150 Seat Belt Warning Bulb Size

The Ford F-150 seat belt warning light utilizes a 194 bulb size for the specific interior illumination component. Provided information covers a time span starting in 1976 and ending in 1996.

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
1988-1996	194
1985-1986	194
1976-1979	194

Bulb Specifications

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

Other Locations

Additional Notes

The Ford F-150 seat belt warning position uses the 194 bulb across model years 1976-1979 and 1985-1996.
The 194 is a miniature wedge-type bulb, classified under the T10 form factor, which refers to a tubular globe roughly 10 eighths of an inch wide.
The 194 bulb operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage range typical of instrument panel and warning indicator applications.
The 194 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical parameters shared across manufacturers.
The wedge base design of the 194 means the bulb 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 dashboard indicator bulbs.
Because the 194 is an ANSI standard type, it is produced by multiple manufacturers and is widely interchangeable at the part-number level, provided the replacement unit meets the same voltage and wattage ratings.
The consistent use of a single bulb type across all listed Ford F-150 model years for this position indicates that the seat belt warning circuit maintained the same electrical requirements throughout that production span.