Jeep J-2800 Back Up Light Bulb Size

The Jeep J-2800 back up light bulb size specifications include 1073 and 1156 bulb options for this vehicle model. The replacement chart covers 1965 through 1968 production years with corresponding bulb size data.

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
1967-1968	1073
1965-1966	1156

Bulb Specifications

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

Other Locations

Additional Notes

The Jeep J-2800 backup light bulb specifications cover the 1965-1968 model years, with two distinct bulb sizes used across that range.
The 1073 and 1156 bulbs are both ANSI-standardized single-filament bulbs operating at 12 volts and sharing the BA15s bayonet base, which is a single-contact base with a 15mm collar.
The BA15s bayonet base is a common automotive base type where the bulb is inserted and twisted to lock into the socket, making both bulbs mechanically compatible with the same socket housing.
Despite sharing the same base type, the 1073 and 1156 are not interchangeable without consideration, as the 1073 draws 13 watts while the 1156 draws 21 watts, a meaningful difference in output for a backup light application.
The Jeep J-2800 used the 1156 bulb for the 1965-1966 model years and transitioned to the lower-wattage 1073 for the 1967-1968 model years.
The 1073 is a lower-wattage variant of the 1156, and substituting a higher-wattage bulb in a socket designed for the 1073 may place unintended electrical load on the circuit.