Jeep J-100 Back Up Light Bulb Size

The Jeep J-100 back up light bulb accommodates 3 distinct bulb sizes: 1156, 199, and 1073. The replacement chart covers vehicle production data spanning 1965 to 1973.

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
1973	1156
1972	199
1968	1073
1967	1156
1966	1073
1965	1156

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. Variant of 1156. 12V, 21W.	199
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073

Other Locations

Additional Notes

The three bulb types specified across the Jeep J-100 backup light applications are the 1156, 199, and 1073, all of which conform to ANSI standards recognized in the United States and Canada.
All three bulb types share the BA15s bayonet base, a single-contact base design where the "s" denotes a single pin offset to one side, allowing for indexed installation.
The 1156 and 199 both operate at 12V and 21W, while the 1073 operates at 12V but draws only 13W, making it a lower-output variant within the same base family.
The 199 is classified as a variant of the 1156, meaning the two share the same electrical ratings and base type, though they carry distinct ANSI designations.
Because the 1156, 199, and 1073 all use the BA15s bayonet base, physical installation is possible across all three types, but the wattage difference between the 1073 and the other two means they are not electrically interchangeable without affecting output brightness.
The Jeep J-100 used the 1156 bulb for the 1965, 1967, and 1973 model years, making it the most frequently specified backup light bulb across the listed production span.
The 1073 was specified for the Jeep J-100 in 1966 and 1968, placing a 13W bulb in years that otherwise alternated with the higher-wattage 1156 specification.
The 199 appears exclusively in the 1972 model year entry, representing the only application of that particular ANSI designation within these specifications.