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2001-peterbilt-379-fuse-panel-diagram | PREMIUM — 2025 |

: Power for the diagnostic port (typically an orange wire with a red stripe).

: You can often find a "yellow box" or a silver housing on the passenger side firewall in the engine compartment. This area typically contains heavy-duty fuses or relays for the ECM and high-draw systems. 2001-peterbilt-379-fuse-panel-diagram

: Some 379 models feature a smaller mini-fuse panel behind the steering wheel or near the instrument cluster. : Power for the diagnostic port (typically an

: The main 50-amp fuse or primary circuit breaker is usually located near the battery compartment or inside the battery box itself. Common Fuse Assignments 2001-peterbilt-379-fuse-panel-diagram

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