Ford Squire License Plate Bulb Size

The Ford Squire license plate light uses bulb size 57 or 63 depending on the specific version. Data for the provided components covers the range from 1956 to 1960.

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
1959-1960	57
1956-1958	63

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W.	63

Other Locations

Additional Notes

The Ford Squire uses two bulb types across its license plate fitment specifications: the ANSI 57 and the ANSI 63, both of which are single-filament bulbs rated at 12 volts and sharing the BA9s base type.
The BA9s base is a miniature bayonet cap with a 9mm body, commonly found in low-wattage indicator and license plate applications.
The ANSI 57 bulb is rated at 1W, making it slightly higher in wattage than the ANSI 63, which is rated at 0.63W.
Both the ANSI 57 and ANSI 63 are classified as US and Canada standards, meaning their ratings conform to North American automotive lighting requirements.
The Ford Squire used the ANSI 63 bulb for the 1956-1958 model years in the license plate position.
The Ford Squire transitioned to the ANSI 57 bulb for the 1959-1960 model years in the license plate position.
Although the ANSI 57 and ANSI 63 share the same BA9s base, they are not interchangeable without consideration of their wattage difference, as substituting a higher-wattage bulb in a socket rated for a lower-wattage unit can affect socket and circuit integrity.