The Dodge Ram 1500 Van brake light utilizes 3157 and 2458 bulb sizes for the rear lighting system. Data for the specific components covers the period from 1999 through 2003.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge Ram 1500 Van uses the 3157 bulb for its brake lights across the 1999-2003 model years. The 3157 is a dual-filament T25 wedge bulb rated at 12V with a 27W/7W output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary function such as running lights.
The 3157 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
The center high mount stop light (CHMSL) on the Ram 1500 Van does not use a single bulb size across all five model years. Three different T15 wedge bulbs appear across the 1999-2003 range: the 921, 922, and 912.
The 921 is specified for the CHMSL in the 1999-2000 model years. It is a T15 wedge bulb rated at 12V and 16W.
The 922 is specified for the 2001 model year CHMSL. It is also a T15 wedge bulb rated at 12V and 16W, sharing its wattage rating with the 921.
The 912 is specified for the 2002-2003 model years in the CHMSL position. It is a T15 wedge bulb rated at 12V and 12W, making it a lower-wattage variant within the same bulb family as the 921.
Although the 912, 921, and 922 share the T15 wedge form factor, their wattage ratings differ. The 912 draws 12W while the 921 and 922 each draw 16W, which means these bulbs are not electrically interchangeable without affecting light output.
The 912 is classified as a variant of the 921 despite the wattage difference, indicating a shared physical base and socket compatibility within the T15 family. However, wattage differences remain a relevant factor in fitment decisions for the CHMSL position.
The 3157 dual-filament construction distinguishes it from the single-filament T15 bulbs used in the CHMSL. A dual-filament bulb contains two separate wire elements within one envelope, each activated under different circuit conditions.
All bulb sizes listed across both brake light positions on the Ram 1500 Van conform to ANSI standards applicable in the United States and Canada.