Plymouth Belvedere front and rear side marker bulbs utilize 194 or 1895 bulb sizes across both positions. The replacement chart covers 1968 through 1971 production years 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 Plymouth Belvedere side marker specifications cover the 1970-1971 model years and the 1968 model year, with both front and rear positions listed for each year.
Two bulb types appear across the Belvedere side marker positions: the 194 and the 1895, both of which conform to ANSI standards recognized in the United States and Canada.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, making it a relatively higher-output unit within the miniature wedge category.
The 1895 is a T5 miniature wedge bulb rated at 12V and 0.9W, representing a significantly lower wattage than the 194.
The T5 and T10 designations refer to the bulb's tubular envelope width, measured in units of one-eighth of an inch, meaning the T5 envelope is 5/8 inch wide and the T10 is 10/8 inch wide.
For the 1970-1971 Plymouth Belvedere, both the front and rear side marker positions use the 194 bulb in identical fashion, indicating no distinction between front and rear fitment for those years.
The 1968 Plymouth Belvedere uses the 1895 bulb for both front and rear side marker positions, a different type from the one used in 1970-1971.
Because the 194 and 1895 differ in both envelope size and wattage, the two types are not interchangeable across model years without accounting for socket compatibility and circuit load differences.