Ford F-650 front and rear side marker bulbs utilize 12961 or 194 size bulbs at the front and 3157 or 194 size bulbs at the rear, with each bulb size corresponding to specific vehicle configurations. The replacement chart covers 2000 through 2022 model years with corresponding bulb size specifications for side marker applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.