Ram 3500 Courtesy Bulb Size

The Ram 3500 courtesy light uses 906 and 212-2 bulb sizes according to the provided data. The information covers a range from 2015 through 2024 for the specified vehicle.

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 Type	Shop
2023-2024	906	Check Price
2018-2020	212-2	Check Price
2015	906	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906	Check Price
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2	Check Price

Other Locations

Additional Notes

The 906 bulb is an ANSI-standardized miniature wedge type with a T10 form factor, rated at 12 volts and 8 watts. It is recognized across both the United States and Canada.
The 212-2 bulb is an ANSI-standardized festoon type with an SV8.5 base and a 41mm length, rated at 12 volts and 12 watts. Festoon bulbs mount by pressing between two spring clips rather than inserting into a socket.
The 212-2 draws 12 watts compared to the 906 at 8 watts, meaning the two types are not electrically equivalent and are not interchangeable despite both operating on a 12-volt system.
The Ram 3500 uses the 906 bulb for the 2023-2024 model years and the 212-2 for the 2018-2020 model years, with the 906 also specified for 2015.
The T10 wedge base of the 906 and the SV8.5 festoon base of the 212-2 are physically distinct socket types, which prevents cross-installation between the two bulb formats.