The Peterbilt 362 front and rear turn signal bulbs utilize a 2057 or 198 size specification. The replacement chart covers vehicle production spanning 1986 to 2006.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The two bulb types specified for the Peterbilt 362 front and rear turn signals are the 2057 and the 198, both of which conform to ANSI standards recognized in the United States and Canada.
The 2057 is a dual-filament bulb operating at 12 volts with a power draw of 26.9 watts on its primary filament and 8 watts on its secondary filament, mounted on a BAY15d bayonet base.
The 198 is a miniature wedge bulb of the T5 type, rated at 12 volts and 2 watts, representing a significantly lower output than the 2057.
The 2057 is described as a brighter variant of the 1157, which means it shares the same BAY15d bayonet base and dual-filament design but produces higher light output on the main filament.
For the Peterbilt 362, the 2057 is the predominant front turn signal bulb across model years 1986-2006, though certain trim and headlamp configurations within that span require the 198 instead.
Several model years carry two separate front turn signal entries, meaning the correct bulb depends on the specific headlamp configuration of the vehicle rather than the model year alone.
In 1990, the front turn signal fitment is reversed relative to most other years: the base specification calls for the 198, while the halogen capsule headlamp variant requires the 2057.
Rear turn signal fitment on the 362 similarly splits between the 2057 and the 198 across multiple years, with headlamp configuration again serving as the determining factor in years where two entries exist.
The rear turn signal for model years 1997-2006 is uniformly specified as the 2057, with no conditional variants listed for that range.
Because the 198 and 2057 differ in base type, wattage, and filament count, the two bulbs are not interchangeable, and headlamp configuration must be confirmed before selecting a replacement for any year that lists both options.