Jeep Gladiator License Plate Bulb Size

The Jeep Gladiator license plate light uses bulb size 89 for illumination purposes. Data for the specified component covers the period from 1962 through 1968.

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
1962-1968	89

Bulb Specifications

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

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Additional Notes

The 89 bulb is the sole license plate bulb size listed for the Jeep Gladiator across all recorded model years in these specifications, covering 1962-1968.
The 89 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used across both the United States and Canada.
It is a single-filament bulb, which means it serves one lighting function only, as opposed to dual-filament bulbs that handle two functions such as running and brake lighting.
The 89 bulb uses a BA15s bayonet base, a single-contact mount where the bulb is inserted and twisted to lock into place rather than screwed in.
Operating at 12 volts and 13 watts, the 89 bulb draws relatively modest power, consistent with its role as a low-demand license plate light.
The 89 is described as a lower wattage variant of the 1156 bulb, sharing the same BA15s bayonet base but producing less output, which means the two are not directly interchangeable despite their physical similarities.