The International 1000D uses a 198 bulb size for both front and rear turn signal applications. This replacement chart covers 1969 to 1970 vehicle production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 1000D uses the 198 bulb for both the front and rear turn signals across the 1969-1970 model years.
The 198 is an ANSI-standardized bulb type, meaning its specifications conform to a defined North American standard recognized in both the United States and Canada.
The 198 bulb follows a T5 form factor, which refers to a miniature wedge-base construction. The wedge base eliminates the need for a separate metal socket, as the glass envelope itself acts as the retaining element.
The 198 operates at 12 volts and draws 2 watts, placing it among the lower-output bulbs used in automotive signaling applications.
Because the same 198 bulb size is specified for both the front and rear turn signal positions on the International 1000D, a single bulb type serves all four turn signal locations on the vehicle.
The Light Duty designation associated with the 198 bulb in these specifications indicates the application category for the 1000D trim level, distinguishing it from heavier-duty configurations that may use different components.