Ford Squire front turn signal bulbs use 1034 or 1129 size, while rear turn signal bulbs use 1073 or 1129 size. The replacement chart covers 1956 through 1960 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Squire uses three bulb types across its front and rear turn signal positions for the 1956-1960 model years: the 1034, 1129, and 1073.
The 1034 and 1129 are both ANSI-standard dual-filament bulbs rated at 12V and 21/5W, fitted with a BAY15d bayonet base, and classified as variants of the 1157.
Despite sharing identical electrical ratings, base type, and filament configuration, the 1034 and 1129 are distinct part numbers and are not listed as interchangeable within these specifications.
The 1073 is a single-filament bulb rated at 12V and 13W, fitted with a BA15s bayonet base, and classified as a lower wattage variant of the 1156.
The BA15s base of the 1073 differs from the BAY15d base of the 1034 and 1129, making these bulb types physically incompatible with each other's sockets.
The Ford Squire front turn signal position transitioned from the 1129 to the 1034 between the 1958 and 1959 model years.
The rear turn signal position on the 1959-1960 Ford Squire uses the 1073, while the front position for those same years uses the 1034, meaning the front and rear sockets are not interchangeable.
For the 1956-1958 model years, the Ford Squire front and rear turn signal positions share the same 1129 bulb specification.