Dodge Ram 50 headlights use H6054, H4651, H4652, and H4656 bulb sizes depending on beam configuration and model year. The replacement chart covers 1983 to 1993 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 Dodge Ram 50 uses two distinct sealed beam form factors across its model years: the 5x7-inch rectangular H6054 unit and the 4x6-inch rectangular H4651, H4652, and H4656 units. All are ANSI-standard sealed beam designs rated at 12V and distributed across the US and Canadian markets.
Sealed beam units are self-contained assemblies in which the filament, reflector, and lens are fused into a single housing. When a filament fails, the entire unit is replaced rather than an individual bulb.
The H6054 is the most frequently specified bulb across the Ram 50 lineup, covering both high beam and low beam positions for the 1987-1993 model years.
For the 1983-1986 model years, the Ram 50 uses 4x6-inch sealed beam units. The high beam position takes the H4651 across all four of those years, while the low beam position uses the H4652 for 1984-1986 and the H4656 for 1983.
Although the H4651, H4652, and H4656 share the same 4x6-inch rectangular form factor and ANSI classification, they are not interchangeable across positions. The H4652 is a variant of the H4651 and is designated specifically for the low beam position, while the H4651 is designated for high beam use.
The H6054 and the 4x6-inch family of sealed beams are physically incompatible with each other due to their differing form factors, meaning units from the 1983-1986 generation cannot be substituted into 1987-1993 housings or vice versa.