Peterbilt 310 Headlight Bulb Size

The Peterbilt 310 headlight bulb specifications include high beam sizes H6054, 9004, and H4651, along with low beam sizes H6054, 9004, and H4652 in multiple bulb configurations. The replacement chart covers 1986 to 1987 model year data with corresponding bulb size information for each headlight type.

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
1986-1987	H6054 (With 2 Rectangular Headlamps)
	H4651 (With 4 Rectangular Headlamps)
	H5001 (With 4 Round Headlamps)
	9004 (With Halogen Capsule Headlamps)

Low Beam Headlight

Years	Bulb Size
1986-1987	H6054 (With 2 Rectangular Headlamps)
	H4652 (With 4 Rectangular Headlamps)
	H5006 (With 4 Round Headlamps)
	9004 (With Halogen Capsule Headlamps)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6054
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). Dual-filament halogen bulb with P29t base. 12V, 65W/45W.	9004
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). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006

Other Locations

Additional Notes

The Peterbilt 310 (1986-1987) accommodates four distinct headlamp configurations: 2-rectangular, 4-rectangular, 4-round, and halogen capsule systems. Each configuration requires its own specific bulb type, and these types are not interchangeable across configurations.
The H6054 is a 5x7-inch rectangular sealed beam unit operating at 12V and conforming to ANSI standards for the US and Canada. It serves both high and low beam functions within the 2-rectangular headlamp configuration, meaning a single bulb type covers both beam roles in that setup.
The 9004 is the only non-sealed-beam type listed in these specifications. It is a dual-filament halogen bulb with a P29t base, rated at 12V with 65W for high beam and 45W for low beam. Its dual-filament design allows one physical bulb to handle both beam functions in the halogen capsule headlamp configuration.
Sealed beam units, including the H6054, H4651, H4652, H5001, and H5006, are not serviceable at the bulb level. When a sealed beam fails, the entire unit requires replacement rather than an internal bulb swap.
The 4-rectangular headlamp configuration uses two distinct sealed beam types depending on beam function: the H4651 for high beam and the H4652 for low beam. Both are 4x6-inch rectangular units, with the H4652 classified as a variant of the H4651.
The 4-round headlamp configuration similarly splits beam functions across two separate sealed beam units: the H5001, a 4-inch square sealed beam, handles high beam, while the H5006, a 5.75-inch round sealed beam, handles low beam.
All bulb and sealed beam types listed for the Peterbilt 310 operate at 12V and conform to ANSI standards applicable in both the United States and Canada.
The specifications for the 1986 and 1987 model years are identical across all four headlamp configurations and both beam functions, with no variation in bulb types between those two years.