Jeep Wagoneer License Plate Bulb Size

The Jeep Wagoneer license plate light requires bulb sizes 168 and 89 for proper illumination of the rear vehicle area. Available data for the specified lighting components covers the period from 1963 through 1990.

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
1985-1990	168
1963-1968	89

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89

Other Locations

Additional Notes

The Jeep Wagoneer license plate bulb specifications cover two distinct model year groups, each using a different bulb type: the 168 for 1985-1990 and the 89 for 1963-1968.
The 168 bulb is a T10 miniature wedge type, operating at 12 volts and 4.9 watts, and follows the ANSI standard applicable in both the US and Canada.
The wedge base design of the 168 bulb means it is held in place by friction rather than a locking mechanism, requiring no rotation during installation or removal.
The 89 bulb operates at 12 volts and 13 watts, making it significantly higher in wattage than the 168 used in later Wagoneer model years.
The 89 bulb uses a BA15s bayonet base, which is a single-contact bayonet fitting that locks into its socket with a quarter-turn motion.
The 89 bulb is described as a lower wattage variant of the 1156, meaning the two share the same BA15s base type but differ in power output, and they are not interchangeable despite the physical similarity.
Both the 168 and the 89 are ANSI-standardized bulbs, meaning their electrical and physical specifications conform to a defined industry standard recognized across the US and Canada.
The base types of the two bulbs, wedge for the 168 and bayonet for the 89, are physically incompatible with each other, so the socket design differs between the two Wagoneer production periods.