The International 5000 front turn signal uses a 1156 bulb size while the rear turn signal requires a 1157 bulb size. The replacement chart covers vehicle production spanning 1992 to 1997.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 5000 uses the 1156 bulb for the front turn signal across the 1992-1997 model years.
The 1156 is a single-filament bulb operating at 12V and 21W, fitted with a BA15s bayonet base, and recognized under ANSI standards in the United States and Canada.
The BA15s base designation indicates a single-contact bayonet fitting with a 15mm base width, which is not interchangeable with dual-contact bayonet bases.
The rear turn signal on the International 5000 uses the 1157 bulb across the same 1992-1997 model years.
The 1157 is a dual-filament bulb rated at 12V with two wattage outputs, 21W for the turn signal filament and 5W for the secondary filament, and is fitted with a BAY15d bayonet base.
The BAY15d base on the 1157 features offset locating pins, which physically prevents it from being seated in a BA15s socket, making the front and rear bulbs non-interchangeable despite sharing the same 12V operating voltage.
Both the 1156 and 1157 conform to ANSI standards applicable in the United States and Canada, indicating standardized dimensional and electrical tolerances for those markets.
The dual-filament design of the 1157 allows the rear turn signal housing to serve more than one lighting function through a single bulb, with each filament drawing a distinct wattage.