The Nissan 720 front turn signal requires a 1156 bulb size while rear turn signals use either 1157 or 1156 bulb sizes. The replacement chart covers vehicle production years spanning 1980 to 1986 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Nissan 720 front turn signal position uses the 1156 bulb across all model years covered in the specifications, spanning 1980-1986.
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.
The BA15s base features a single contact pin, which physically prevents it from seating into sockets designed for dual-pin bases, making cross-installation with the 1157 mechanically incompatible in most housings.
The Nissan 720 rear turn signal position uses the 1156 bulb for model years 1980-1982, then transitions to the 1157 bulb for model years 1983-1986.
The 1157 is a dual-filament bulb rated at 12V with two wattage outputs, 21W for the high-intensity filament and 5W for the low-intensity filament, and it uses a BAY15d bayonet base.
The BAY15d base on the 1157 has two offset contact pins, a design that distinguishes it from the BA15s base and prevents the two bulb types from being used interchangeably without a socket adapter.
The dual-filament design of the 1157 allows a single bulb to serve both turn signal and parking light functions simultaneously, which is consistent with its application in the rear position on later 720 model years.
Both the 1156 and 1157 share the same 21W output on their primary filament, meaning the turn signal brightness remains consistent across all model years and both front and rear positions.
The rear turn signal socket on 1983-1986 Nissan 720 models is wired to accommodate the dual-filament 1157, and installing a single-filament 1156 in that position would result in the loss of whichever secondary function the socket is wired to support.