2015 Peterbilt 389 Fuse Panel Diagram
đź“Ť Driver side, under dash panel (left of steering column).
Always verify if your truck is equipped with the PACCAR MX-13 or the Cummins ISX15. While the cab fuse panel is identical, the under-hood power distribution center differs slightly between engine packages. 2015 Peterbilt 389 Fuse Panel Diagram
Note: Always verify with your specific VIN and chassis configuration—Peterbilt used slightly different layouts depending on options. 📍 Driver side, under dash panel (left of steering column)
The physical sticker on the glove box door is notorious for fading. Do not rely on it. Instead, get a permanent copy: Note: Always verify with your specific VIN and
2015 Peterbilt 389 utilizes a multi-panel fuse system designed to support its complex modern electronics. While the diagrams are essential for troubleshooting, their utility is often impacted by scattered physical locations and occasionally ambiguous labeling. Fuse Panel Locations
🔧 Tip: Always use a test light—don’t guess and pull fuses blind.
The is not just a picture—it is your truck’s electrical nervous system map. Whether you are chasing a dead trailer light at a weigh station or diagnosing a no-start in a truck stop parking lot, knowing that Fuse #10 controls the brake lamps or that the starter signal lives in the battery box saves hours of frustration.