The Ford F-2 front and rear turn signal bulbs both utilize a 1129 size bulb for proper operation. The replacement chart covers 1950 through 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 turn signal bulb type listed across all model years in these specifications for the Ford F-2, appearing in both front and rear turn signal positions for 1950-1952.
The 1129 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across those markets.
As a dual-filament bulb, the 1129 contains two separate filaments within a single envelope, which allows it to serve two distinct lighting functions, such as a brighter signal flash and a dimmer running light, from one unit.
The 1129 uses a BAY15d bayonet base, a two-pin offset base type where the two pins are positioned at different heights to ensure the bulb can only be inserted in one orientation, preventing incorrect filament alignment.
The 1129 operates at 12 volts with a dual wattage rating of 21/5W, where 21 watts corresponds to the higher-intensity filament and 5 watts to the lower-intensity filament.
The 1129 is described 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 electrical compatibility may result in incorrect function or fitment issues.