Ford B-600 Seat Belt Warning Bulb Size

The Ford B-600 seat belt warning light requires a 194 bulb size for proper illumination of the dashboard indicator. Data for the specified component covers the range from 1989 through 1994.

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
1989-1994	194

Bulb Specifications

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

Other Locations

Additional Notes

The Ford B-600 uses the 194 bulb for the seat belt warning light across the 1989-1994 model years.
The 194 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 194 bulb follows the T10 miniature wedge form factor, a design that uses a tapered plastic base to secure the bulb directly into a socket without a separate metal cap or bayonet pins.
The 194 operates at 12 volts, which is consistent with standard automotive electrical systems.
At 3.78 watts, the 194 draws a low level of power, which is typical for instrument panel and warning indicator applications.