The Ford F-1 front and rear turn signal bulbs both utilize a 1129 size bulb for proper operation. The replacement chart covers 1950 to 1952 model 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 1129 bulb is the sole bulb type specified for the Ford F-1 across all listed model years and positions, covering both front and rear turn signals from 1950-1952.
The 1129 is an ANSI-standardized bulb recognized in both the United States and Canada, operating at 12 volts with a dual-filament design rated at 21/5 watts.
The dual-filament construction of the 1129 allows it to serve two distinct brightness levels within a single bulb, which is a characteristic common to bulbs used in combined stop and turn signal applications.
The 1129 uses a BAY15d bayonet base, a two-pin offset base type where the two pins are positioned at different heights to ensure correct orientation during installation.
The 1129 is noted as a variant of the 1157 bulb. While the two share the BAY15d base and dual-filament design, they are not identical, and substitution between them without confirming voltage and wattage compatibility may result in incorrect fitment or function.