Peterbilt 359 License Plate Bulb Size

Additional Notes

• The Peterbilt 359 uses two distinct bulb sizes for the license plate position across the 1986-1988 model years: the 67 and the 97, with fitment determined by the headlamp configuration of the vehicle.
• The 67 is an ANSI-standard single-filament bulb rated at 12V and 8W, fitted with a BA15s bayonet base. It is classified as a lower wattage variant of the 1156 bulb family.
• The 97 is also an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 13W. It is a variant of the 1156 and carries a higher wattage output than the 67.
• Both the 67 and 97 share the same BA15s bayonet base type, meaning they are physically interchangeable in terms of socket fitment, though their wattage ratings differ.
• Despite sharing a base type, substituting one bulb for the other may result in a mismatch with the electrical load the circuit was designed to handle, since the 97 draws approximately 63 percent more wattage than the 67.
• The 97 bulb applies specifically to Peterbilt 359 units equipped with Halogen Capsule Headlamps across all three model years covered in the specifications.
• The 67 bulb applies to Peterbilt 359 units not equipped with Halogen Capsule Headlamps, representing the standard configuration for the same 1986-1988 span.
• Both bulb sizes carry ANSI recognition valid in both the United States and Canada, indicating conformance to a shared North American standardization framework for automotive lighting.