Ram 2500 Courtesy Bulb Size

The Ram 2500 courtesy light requires bulb size 906 or 212-2 depending on the specific configuration of the vehicle. Data for the lighting components covers the range from 2015 to 2024.

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 Size
2023-2024	906
2018-2020	212-2
2015-2016	906

Bulb Specifications

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

Other Locations

Additional Notes

The Ram 2500 courtesy lighting specification references two distinct bulb types across its model years: the 906 and the 212-2, both conforming to ANSI standards recognized in the United States and Canada.
The 906 is a T10 miniature wedge bulb rated at 12 volts and 8 watts. The wedge base design means the bulb is held in place by tension from the socket contacts rather than a separate locking mechanism.
The 212-2 is a festoon bulb with a 41mm length and an SV8.5 base, rated at 12 volts and 12 watts. Festoon bulbs are cylindrical in form and make contact at each end, fitting into spring-clip sockets.
The 212-2 draws 12 watts compared to the 906 at 8 watts, meaning the two bulb types are not electrically equivalent and are not interchangeable without accounting for the difference in power draw.
The Ram 2500 uses the 906 bulb for courtesy lighting in 2015-2016 and again in 2023-2024.
The 212-2 festoon bulb is specified for the Ram 2500 courtesy application in 2018-2020.
The SV8.5 base on the 212-2 and the wedge base on the 906 represent physically incompatible socket types, making cross-substitution between these two bulbs mechanically impossible without socket modification.