Peterbilt 362 Headlight Bulb Size

Additional Notes

• The Peterbilt 362 high beam and low beam headlight specifications across 1986-2006 draw from four distinct headlamp system configurations: 2 rectangular headlamps, 4 rectangular headlamps, 4 round headlamps, and halogen capsule headlamps. Each configuration requires a different bulb type, and the correct fitment is determined strictly by which headlamp system is installed on the vehicle.
• The H6054 is a 5x7-inch rectangular sealed beam unit operating at 12V and conforming to ANSI standards for the US and Canadian markets. It serves both high beam and low beam functions in the 2-rectangular-headlamp configuration across the full 1986-2006 span covered by these specifications, making it the single most consistently listed bulb type in the data.
• The 9004 is a dual-filament halogen bulb with a P29t base, rated at 12V with 65W on high beam and 45W on low beam. Because it carries both filaments in a single capsule, it handles both high and low beam duties within the halogen capsule headlamp configuration across the entire 1986-2006 range.
• All sealed beam units listed, including the H6054, H4651, H4652, H4656, H5001, and H5006, are not serviceable at the bulb level. When one of these units fails, the entire sealed beam assembly is replaced rather than an internal component.
• The 4-rectangular-headlamp configuration on the Peterbilt 362 uses separate bulb types for high and low beam functions. The H4651 is specified for high beam duty, while the low beam position is filled by either the H4652 or H4656 depending on the model year, both of which are 4x6-inch rectangular sealed beam units operating at 12V.
• The H4652 is described as a variant of the H4651, and both share the same 4x6-inch rectangular sealed beam format at 12V. Despite their physical similarity, they are designated for different beam positions and are not interchangeable within the 4-rectangular-headlamp system.
• The 4-round-headlamp configuration, present in the specifications for 1986-1997, uses the H5001 for high beam and the H5006 for low beam. The H5001 is a 4-inch square sealed beam unit, while the H5006 is a 5.75-inch round sealed beam unit, both at 12V. The physical size difference between these two units means they occupy distinct positions within the headlamp assembly and are not interchangeable.
• The 4-round-headlamp configuration does not appear in the specifications for 1998-2006, as those years list only three headlamp system variants rather than four. Selecting a replacement bulb for the Peterbilt 362 therefore requires confirming both the model year and the specific headlamp system installed, since multiple non-interchangeable options exist within the same year.