Ford Ranchero Headlight Bulb Size

Ford Ranchero high beam and low beam headlight bulb sizes include H4651, H5001, H6024 for high beam applications and H4652, H4656, H5006 for low beam applications, with each bulb size corresponding to specific vehicle configurations. The replacement chart covers 1957 through 1979 production years and correlates vehicle model years to their respective headlight bulb specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	Bulb Size
1977-1979	H4651
1967-1976	H5001
1960-1966	H6024
1958-1959	H5001
1957	H6024

Low Beam Headlight

Years	Bulb Size
1979	H4652
1977-1978	H4656
1967-1976	H5006
1960-1966	H6024
1958-1959	H5006
1957	H6024

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4651
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V.	H4652
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4656
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006

Other Locations

Additional Notes

All headlight bulbs listed for the Ford Ranchero across its full model range are sealed beam units, meaning the entire lens-and-filament assembly is replaced as one piece rather than a separate bulb being swapped out of a housing.
Three physical formats appear across the specifications: a 7-inch round sealed beam (H6024), a 4-inch square sealed beam (H5001), and a 4x6-inch rectangular sealed beam (H4651, H4652, H4656). All operate at 12V and conform to ANSI standards recognized in both the United States and Canada.
The Ford Ranchero used the H6024 7-inch round sealed beam for both high and low beam functions during 1957 and 1960-1966, reflecting a single-unit, dual-filament design common to four-headlight and two-headlight systems of that period.
From 1967-1976, the Ranchero used separate high beam (H5001) and low beam (H5006) sealed beam units. The H5001 is a 4-inch square unit, while the H5006 is a 5.75-inch round unit, meaning the two beams occupy physically different housing shapes and are not interchangeable with each other.
The H4652 low beam unit used in the 1979 Ranchero is specified as a variant of the H4651 high beam. Despite sharing the same 4x6-inch rectangular format, the two are distinct part numbers and serve different beam functions, making substitution between them inadvisable.
The 1978-1979 Ranchero high beam specification (H4651) differs from the low beam specification used in those same years. In 1978, the low beam is H4656, while in 1979 it shifts to H4652, indicating a low beam change between those two model years despite the high beam remaining constant.
The 1958-1959 Ranchero used the H5001 high beam and H5006 low beam, the same pairing later used from 1967-1976, though the 1957 model used the H6024 for both beams, reflecting a different headlight system in that earlier year.
Because all units across the specifications are sealed beams conforming to ANSI standards, physical fitment is governed by the unit's format category rather than vehicle-specific mounting, though beam function (high or low) must still match the intended circuit position.