2015 Peterbilt 389 (all trims)
While this reduces wiring weight and complexity, it changes how fuses work. A blown fuse might disable a module, which in turn could cause several other systems to fail simultaneously. Therefore, reading a requires identifying not just the component, but the module controlling it. 2015 Peterbilt 389 Fuse Panel Diagram
This is the chart you came for. The cab panel (behind the glove box) is organized into rows and columns. Fuses are numbered 1 through 30, with a separate relay row above. 2015 Peterbilt 389 (all trims) While this reduces