Dodge Ram 3500 Map Light Bulb Size

The Dodge Ram 3500 map light utilizes bulb sizes 212-2 and 192 according to the provided technical specifications. Available data covers the time range from 1995 through 2010.

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
2006-2010	212-2
2004-2005	192
1995-2003	212-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	192

Other Locations

Additional Notes

The 212-2 is the map light bulb type used in the Dodge Ram 3500 for model years 1995-2003 and 2006-2010, making it the predominant fitment across this vehicle's specification range.
The 212-2 bulb is a festoon-style lamp with an SV8.5 base and a 41mm length, operating at 12 volts and 12 watts.
Festoon bulbs are held in place by spring-loaded end caps rather than a socket, which is a distinct mounting method from wedge or bayonet-style bulbs.
The 192 bulb is specified for the Dodge Ram 3500 map light in model years 2004-2005 only.
The 192 is a T10 miniature wedge bulb rated at 12 volts and 3 watts, a significantly lower wattage than the 212-2.
Because the 212-2 and 192 use different base types, a festoon mount versus a wedge socket, the two bulbs are not interchangeable with each other.
Both the 212-2 and 192 carry ANSI standardization for the US and Canadian markets, meaning either bulb type is available through standard North American automotive supply channels.
The wattage difference between the 212-2 at 12 watts and the 192 at 3 watts reflects a fourfold gap in power draw, which is relevant when sourcing equivalent LED replacements for either fitment.