Dodge Mini Ram Back Up Light Bulb Size

The Dodge Mini Ram back up light utilizes bulb size 1156 and bulb size P21W for illumination. Data for the specified lighting components covers the range from 1984 to 1988.

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
1984-1988	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 Mini Ram uses the 1156 bulb for the back up light across all listed model years, spanning 1984-1988.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard applicable in both the United States and Canada.
This bulb operates on a 12-volt electrical system, which is consistent with the standard automotive electrical architecture found in passenger vehicles and light vans of this era.
The 1156 carries a 21-watt rating, placing it in the mid-range of incandescent automotive bulb wattages and reflecting typical output levels for back up light applications.
The bulb uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width, distinguishing it from double-contact variants such as the BA15d.
Because the 1156 is single-filament, it serves only one lighting function per socket, unlike dual-filament bulbs that can handle two functions such as stop and tail simultaneously.
The BA15s base type is not interchangeable with the BA15d base, and substituting one for the other is not supported by the socket design, as the contact configurations differ.