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Note: Always verify with your specific VIN and chassis configuration—Peterbilt used slightly different layouts depending on options.
2015 Peterbilt 389 , the electrical system is distributed across several key locations. There isn't just one single fuse panel; instead, you’ll find them in the cab, the engine compartment, and the sleeper (if equipped). 2015 Peterbilt 389 Fuse Panel Diagram
This is the primary fuse panel for interior accessories. It is located inside the cab, to the left of the driver’s feet, behind the parking brake handle panel or the kick panel cover. Note: Always verify with your specific VIN and
While the exact map is printed on the inside of each fuse panel cover, here are common assignments for the 389 model: Peterbilt Atlantic Tech Tips: 389 Fuse Panels This is the primary fuse panel for interior accessories
This is the heavy-duty electrical center. It is located under the hood, usually on the driver’s side, mounted near the firewall or on the frame rail just behind the cab.
Disclaimer: This guide is based on standard 2015 Peterbilt 389 production models (VIN 1XPXD40X9FDxxxxxx). Custom body builder modifications or in-cab aftermarket electronics may alter fuse assignments. Always refer to your vehicle’s specific VIN-locked electrical schematics.
For many drivers, finding the correct can be a challenge. Unlike passenger cars where a diagram is often printed on the fuse box cover, heavy-duty trucks often have complex, multiplexed electrical systems that require a deeper understanding. This guide will walk you through the locations of your fuse panels, how to read the diagrams, and troubleshooting tips for the most common electrical problems in the 2015 Peterbilt 389.
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