Dodge Royal Monaco Back Up Light Bulb Size

The Dodge Royal Monaco back up light uses a 1156 bulb size for the replacement illumination component. The chart covers vehicle production years spanning 1975 to 1977 with corresponding bulb specifications.

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
1975-1977	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 1156 is the sole bulb type listed for the back up light across the 1975-1977 Dodge Royal Monaco.
The 1156 operates on a 12-volt electrical system and draws 21 watts, placing it in the mid-range of standard automotive incandescent output.
As a single-filament bulb, the 1156 serves one dedicated function per socket, which aligns with its application in a back up light rather than a combined stop/tail position.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width. The single-contact design is not interchangeable with the dual-contact BA15d base found on two-filament variants such as the 1157.
The 1156 conforms to ANSI standards recognized in both the United States and Canada, indicating a standardized specification shared across North American automotive applications of that era.