Peterbilt 348 Electrical Wiring Diagrams Manual

Peterbilt 348 Electrical Wiring Diagrams Manual

This Peterbilt 348 Electrical Wiring Diagrams Manual offers complete factory schematics for diagnosing and repairing electrical systems on the Peterbilt 348 platform. It includes high-resolution wiring diagrams, connector pinouts, fuse and relay locations, and detailed signal routing across all major vehicle subsystems.

Designed for service technicians and fleet electrical specialists, the manual provides complete circuit layouts for everything from power distribution and lighting to ECM wiring, multiplex modules, and instrument clusters. Each diagram is organized by subsystem and includes component labels, wire color codes, and connector references for precise fault tracing and harness repair.

Content Overview:

• System-Level Wiring Diagrams by Circuit Group
• ECM, TCM, and ABS Module Wiring
• Fuse & Relay Locations, Power Distribution
• Instrument Cluster & Cab Control Module Interfaces
• Lighting Circuits (Headlamps, Turn Signals, Marker Lights)
• HVAC, Wiper, and Auxiliary System Diagrams
• Pinouts for Connectors, Junction Blocks & Sensors
• Ground Distribution and Splice Locations
• Diagnostic Connector and CAN Bus Layouts

This EWD manual is essential for anyone troubleshooting electrical issues or integrating custom equipment on the Peterbilt 348, whether in a dealer setting or a fleet maintenance environment.

Printable: Yes
Language: English
Compatibility: Windows, macOS, Linux
Requirements: PDF reader software