Autocar DK License Plate Bulb Size

The Autocar DK license plate component utilizes 1157 and 198 bulb sizes for illumination. Provided information covers a span from 1983 through 1988 for the specified vehicle.

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
1985-1988	1157
1983-1984	198

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W.	198

Other Locations

Additional Notes

The Autocar DK uses two distinct bulb types across its model years for the license plate position: the 1157 and the 198.
The 1157 bulb is the specified license plate bulb for the Autocar DK across the 1985-1988 model years.
The 198 bulb is specified for the 1983-1984 model years.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, each operating at a different wattage: 21W and 5W at 12 volts.
The 1157 uses a BAY15d bayonet base, a two-pin offset bayonet mount where the two pins are positioned at different heights to prevent incorrect insertion.
The 198 is a miniature wedge bulb of the T5 form factor, rated at 12 volts and 2 watts, making it significantly lower in power output than the 1157.
Both the 1157 and the 198 conform to ANSI standards applicable in the United States and Canada.
The 1157 and the 198 are not interchangeable. The bayonet base of the 1157 and the wedge base of the 198 are physically incompatible, and their wattage ratings differ substantially.