Dodge Ram 50 Back Up Light Bulb Size

The Dodge Ram 50 back up light utilizes 1156 and P21W bulb sizes for illumination. Data for the specific components covers the range from 1983 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
1983-1993	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 Ram 50 uses the 1156 bulb for the back up light across all listed model years, spanning 1983-1993.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail.
It operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive incandescent backup lighting.
The 1156 uses a BA15s bayonet base, a single-contact mount where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d base used on two-filament bulbs.
The 1156 is an ANSI-standardized bulb recognized across the United States and Canada, indicating broad availability and a defined set of electrical and physical tolerances.
Because the BA15s base is a single-contact design, it is not interchangeable with visually similar bulbs that use a BA15d base, such as the 1157, despite sharing the same base width.