International 4700LPX front turn signal bulbs use 1156 size while rear turn signal bulbs use 1157 size. The replacement chart covers 1995 to 1997 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 4700LPX uses the 1156 bulb for the front turn signal across the 1995-1997 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 US and Canada.
A single-filament design means the 1156 serves one lighting function only, which is consistent with its role as a dedicated turn signal bulb.
The rear turn signal on the 1995-1997 International 4700LPX uses the 1157 bulb.
The 1157 is a dual-filament bulb rated at 12V with two wattage outputs, 21W and 5W, and uses a BAY15d bayonet base under the same ANSI standard.
The dual-filament configuration of the 1157 allows it to serve two separate lighting functions from a single housing, typically a brighter output for signaling and a lower output for running or parking light duty.
The 1156 and 1157 are not interchangeable. Their bayonet bases differ, with the BA15s base on the 1156 having a single locating pin and the BAY15d base on the 1157 having two offset pins to prevent incorrect installation.
The offset pin arrangement on the BAY15d base ensures the two filaments of the 1157 are connected to the correct circuits, making physical fitment a built-in safeguard against wiring errors.