Ford Fairmont high beam and low beam headlight bulbs utilize H4651, H6054, H4652, and H4656 size specifications depending on configuration. The replacement chart covers 1978 to 1983 production years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Fairmont uses two physical sealed beam sizes across its model years: the 4x6-inch rectangular format, covering the H4651, H4652, and H4656 types, and the larger 5x7-inch rectangular format used by the H6054 type.
All four bulb types found in these specifications, H4651, H4652, H4656, and H6054, are ANSI-standardized sealed beam units rated at 12V and recognized in both the United States and Canada. In a sealed beam design, the reflector, lens, and filament are fused into a single glass unit, meaning the entire assembly is replaced rather than an internal bulb.
The H6054 is the most frequently appearing bulb type across these specifications. It serves as both the high beam and low beam headlight for the Ford Fairmont across the 1978-1981 model years, accounting for the majority of entries in the data.
For the 1982-1983 model years, the high beam position uses the H4651, while the low beam positions diverge: the 1983 model year uses the H4652 and the 1982 model year uses the H4656. Both the H4652 and H4656 occupy the same 4x6-inch rectangular format as the H4651, though they are distinct part numbers and are not interchangeable with one another.
The H4652 is described as a variant of the H4651. Despite sharing the same physical format and voltage rating, these two types fill different beam positions in the 1983 model year and are not listed as substitutes for each other.
The transition from the 5x7-inch H6054 sealed beam to the 4x6-inch sealed beam family occurs between the 1981 and 1982 model years of the Ford Fairmont, reflecting a change in headlight housing size between those years.