The Freightliner FS65 front and rear side marker bulbs both utilize a 1893 bulb size. The replacement chart covers vehicle production spanning 1996 to 1997.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1893 bulb is the sole bulb type specified across all side marker positions on the Freightliner FS65, covering both front and rear side marker applications for the 1996-1997 model years in the Cab Over Engine configuration.
The 1893 is a miniature wedge bulb of the T5 form factor, operating at 12 volts with a 2-watt power rating. The T5 designation refers to a tubular glass envelope measuring 5/8 of an inch in width.
The wedge base design means the 1893 requires no separate metal base or locking pins; the glass envelope itself acts as the retention mechanism when inserted into a compatible socket.
The 1893 conforms to ANSI standards recognized in both the United States and Canada, indicating the bulb meets a defined set of electrical and physical tolerances established by the American National Standards Institute.
At 2 watts, the 1893 draws minimal current, which is consistent with its role in low-intensity marker lighting rather than high-output illumination functions such as headlamps or brake lights.
The front and rear side marker positions on the Freightliner FS65 share an identical bulb specification, meaning the same 1893 unit is interchangeable between both locations without modification.