The Dodge 600 high beam headlight uses an H4651 bulb size, while low beam headlights require either H4652 or H4656 bulb sizes for proper illumination. The replacement chart covers vehicle production years spanning 1983 to 1988 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge 600 uses sealed beam headlight units across all listed model years (1983-1988), meaning the entire unit is replaced rather than an internal bulb.
All three headlight types specified for the Dodge 600, the H4651, H4652, and H4656, conform to ANSI standards recognized in both the United States and Canada and operate on a 12-volt system.
All three unit types share the same 4x6-inch rectangular form factor, which is a standardized sealed beam size common in North American automotive lighting of that era.
The H4651 is the sole high beam unit across the entire 1983-1988 model range, indicating no variation in high beam fitment across those years.
The H4652 and H4656 are both 4x6-inch rectangular sealed beam units used in the low beam position, though they are distinct part numbers and are not confirmed as interchangeable despite their shared physical format.
Low beam fitment on the Dodge 600 varies by year: the H4652 is specified for 1983, 1985, and 1988, while the H4656 is specified for 1984, 1986, and 1987, making year verification necessary before sourcing a replacement unit.