Dodge Monaco Back Up Light Bulb Size

The Dodge Monaco back up light utilizes 1073, 1156, and P21W bulb sizes depending on the specific production period. Available information covers the time span from 1965 through 1992.

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
1990-1992	1156
1966-1978	1156
1965	1073

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073

Other Locations

Additional Notes

The Dodge Monaco uses the 1156 bulb for the back up light across the 1966-1978 and 1990-1992 model years, making it the dominant fitment across this vehicle's specification range.
The 1156 is an ANSI-standardized single-filament bulb rated at 12 volts and 21 watts, fitted with a BA15s bayonet base, and recognized across both the US and Canadian markets.
The 1965 Dodge Monaco uses the 1073 bulb instead of the 1156, representing the sole departure from the otherwise consistent fitment across all listed model years.
The 1073 is also an ANSI-standardized single-filament bulb with a BA15s bayonet base rated at 12 volts, but it draws only 13 watts compared to the 21 watts of the 1156.
Although both the 1156 and 1073 share the same BA15s bayonet base type, the wattage difference between them is a relevant fitment consideration, as the 1073 produces less light output than the 1156.
The BA15s bayonet base features a single contact pin, which distinguishes it from dual-contact bayonet bases used in two-filament bulbs and makes it incompatible with those sockets.