Jeep Wagoneer Back Up Light Bulb Size

The Jeep Wagoneer back up light utilizes 1156, P21W, and 1073 bulb sizes for various applications. Provided information covers the range from 1963 through 1990 for the specified vehicle components.

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
1972-1990	1156
1968	1156
1967	1073
1964-1966	1156
1963	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 Jeep Wagoneer uses the 1156 bulb as the back up light bulb across the majority of its model years, spanning 1964-1966, 1968-1972, and 1973-1990.
The 1156 is an ANSI-standard single-filament bulb rated at 12 volts and 21 watts, fitted with a BA15s bayonet base.
The BA15s bayonet base uses a single contact pin, which is the defining physical characteristic that distinguishes it from dual-contact bayonet variants.
The 1963 and 1967 Jeep Wagoneer models use the 1073 bulb rather than the 1156 for the back up light position.
The 1073 is also an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12 volts but drawing only 13 watts, making it a lower-wattage variant of the 1156.
Although the 1073 and 1156 share the same BA15s bayonet base, their wattage ratings differ, and the two bulbs are not interchangeable without accounting for that difference in output.
The shared BA15s base between the 1073 and 1156 means either bulb is physically capable of seating in the same socket, which makes year-specific fitment verification relevant when servicing the 1963 or 1967 models.