Dodge W250 Back Up Light Bulb Size

The Dodge W250 back up light utilizes P21W and 1156 bulb sizes for the rear illumination system. Available information covers a specific time span starting from 1981 through 1993.

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
1981-1993	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Dodge W250 uses the 1156 bulb for the back up light across all listed model years, spanning 1981-1993.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail, into a single unit.
It operates on a 12-volt electrical system at 21 watts, which is consistent with standard automotive low-voltage DC circuits.
The 1156 uses a BA15s bayonet base, a single-contact mount where the bulb is inserted and twisted to lock into place.
The 1156 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary one.
Because the 1156 is single-filament, it is not interchangeable with the visually similar 1157, which carries a dual-filament design and a different pin configuration despite sharing the same bayonet base style.