Plymouth PB250 high beam headlight bulbs use H6024 or H4651 size, while low beam headlight bulbs use H6024, H4652, or H4656 size. The replacement chart covers 1981 to 1983 model 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 PB250 uses sealed beam headlight units across all listed years, meaning the entire lens-and-filament assembly is replaced as one unit rather than swapping an internal bulb.
Three sealed beam formats appear in these specifications: the H6024, a 7-inch round unit, and the H4651, H4652, and H4656, all of which are 4x6-inch rectangular units. All operate at 12V and conform to ANSI standards recognized in both the United States and Canada.
The Plymouth PB250 for 1982-1983 was available with either a two-round-headlamp or a four-rectangular-headlamp configuration, and the correct sealed beam type depends entirely on which configuration is present on the vehicle.
On 1982-1983 vehicles equipped with two round headlamps, the H6024 serves as both the high beam and low beam unit. This is consistent with how 7-inch round sealed beams function, as a single unit per side handles both beam functions through separate filaments.
On 1982-1983 vehicles with four rectangular headlamps, the high beam position uses the H4651, while the low beam position uses different units depending on the year: the H4652 for 1983 and the H4656 for 1982. These are distinct part numbers and are not interchangeable with each other.
The 1981 Plymouth PB250 carried only the four-rectangular-headlamp configuration in these specifications, with the H4651 for high beam and the H4656 for low beam, matching the 1982 rectangular-lamp fitment.
The H4651 and H4652 are both 4x6-inch rectangular sealed beam units, with H4652 described as a variant of H4651. Despite their physical similarity, they occupy different positions in the headlamp system and are not listed as substitutes for one another.
Because the H6024, H4651, H4652, and H4656 are all sealed beam units rather than bulb-and-housing assemblies, fitment is determined by the physical format of the headlamp housing on the vehicle, not by a socket type.