Peterbilt 382 Back Up Light Bulb Size

The Peterbilt 382 back up light requires a 1156 bulb size for proper installation and function. Available data covers the period from 2011 through 2017 for the specified vehicle.

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

Bulb Size by Year Range

Years	Bulb Size
2011-2017	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Peterbilt 382 uses the 1156 bulb for its back up light across the 2011-2017 model years.
The 1156 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard shared across the United States and Canada.
The 1156 operates on a 12-volt electrical system, which is consistent with standard automotive DC voltage.
At 21 watts, the 1156 is a single-filament incandescent bulb, meaning it serves only one lighting function rather than switching between two brightness levels as a dual-filament bulb would.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width, a common automotive socket type.
Because the 1156 is single-contact, it is not interchangeable with the 1157, which shares the same BA15d bayonet base style but has two contacts for dual-filament operation.