Ram ProMaster front turn signal bulbs use 7444NA, 7440NA, or 7443NA sizes, while rear turn signal bulbs use 7440 or 7440NA sizes. The replacement chart covers 2014 through 2024 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 Ram ProMaster front turn signal uses two distinct bulb families across its model years: the dual-filament 7443NA for 2014-2018 and the dual-filament 7444NA for 2019-2024, with the exception of 2023, which takes the single-filament 7440NA.
The 7444NA and 7443NA are both dual-filament T20 wedge bulbs rated at 12V, 21W/5W, meaning one filament handles the higher-wattage turn signal function while the second filament operates at a lower wattage, typically for a parking or daytime running light role.
The natural amber glass coating on the 7444NA, 7443NA, and 7440NA produces an amber output from a clear or near-clear filament, as opposed to a colored lens achieving the same effect externally.
The 7440NA and 7440 are both single-filament T20 wedge bulbs rated at 12V, 21W, making them functionally similar in output, with the key distinction that the 7440NA carries a natural amber glass envelope while the 7440 does not.
All four bulb types listed follow the ANSI standard applicable to the United States and Canada, indicating a standardized base and envelope size within the T20 wedge format.
Because the 7444NA and 7443NA share the same wattage ratings, filament count, and T20 wedge base, the front turn signal socket on the Ram ProMaster accommodates both types physically, though the specific bulb specified per year should be observed for correct fitment.
The rear turn signal on the Ram ProMaster uses only single-filament bulbs, either the 7440NA or the 7440, across all listed model years, contrasting with the dual-filament requirement at the front position.
Substituting a 7440 for a 7440NA in a rear turn signal position would place a clear-envelope bulb in a socket where an amber-envelope bulb is specified, which may affect the color output if the lens housing itself is not amber-tinted.
Substituting a single-filament 7440NA for a dual-filament 7444NA in the front turn signal position would result in the loss of the secondary low-wattage filament function, regardless of the physical fit.