Ford LTD II License Plate Bulb Size

The Ford LTD II license plate light requires a 168 bulb size for proper illumination on the rear of the vehicle. Data for the specific component covers the range from 1977 to 1979.

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
1977-1979	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The bulb size 168 is an ANSI-standardized miniature wedge type, classified under the T10 form factor, and operates at 12 volts with a power draw of 4.9 watts.
The T10 wedge base design means the bulb is held in its socket by the tension of the base pins alone, without a separate locking mechanism or bayonet collar.
The Ford LTD II uses the 168 bulb for its license plate position across the 1977-1979 model years.
The 168 bulb carries dual-market ANSI standardization, covering both the United States and Canada, which reflects a shared North American automotive lighting standard for this specification.
At 4.9 watts, the 168 operates at a relatively low wattage consistent with its role as an illumination bulb for a license plate rather than a signaling or high-visibility function.