This comprehensive manual provides detailed electrical wiring schematics for the Peterbilt 379 and 379e model family of commercial trucks. It offers a complete guide to understanding and troubleshooting the electrical system, encompassing various components and circuits.

The manual is organized into sections, each focusing on a specific aspect of the electrical system. You'll find detailed schematics covering the following areas:

* **Harness Architecture:** Understanding the overall layout and organization of the electrical harness.
* **Location of Major Components:** Maps showing the precise locations of key electrical components, simplifying troubleshooting and repairs.
* **Symbols Index:** A comprehensive index of symbols used in the schematics, ensuring clear interpretation of the diagrams.
* **Charge and Start System:** Schematics detailing the battery, starter, and charging system operation.
* **Power Distribution:** Detailed schematics for both switched and unswitched circuits, covering power distribution throughout the vehicle. This includes circuits for engine, ignition, accessories, and more.
* **Lighting Systems:** Comprehensive wiring diagrams for all lighting systems, including headlights, taillights, turn signals, hazard lights, marker lights, backup lights, and cab lights.
* **Cab Features:** Schematics for cab features like door locks, windows, mirrors, HVAC, radio, and more.
* **Sleeper Features:** Wiring diagrams for sleeper features such as lighting, power outlets, HVAC, and other amenities.
* **Engine Systems:** Comprehensive schematics for various engine types, including Caterpillar C11, C13, and C15, as well as Cummins ISB, ISC, ISL, and ISX engines.
* **Transmission Systems:** Detailed wiring diagrams for various transmission types, including Eaton Ultrashift, Autoshift, Meritor FreedomLine, Allison WTEC, and Eaton Lightning transmissions.
* **Anti-lock Braking Systems (ABS):** Schematics for both Bendix and WABCO ABS systems, covering both cab and chassis components.
* **Chassis Systems:** Wiring diagrams for chassis systems like the fifth wheel, suspension, air dryer, fuel system, and more.
* **Electronics and Sensors:** Schematics for electronic components and sensors, including the engine control unit (ECU), ICON2 idle control, telematics, and more.
* **Special Features:** Wiring diagrams for optional features like remote keyless entry, dual station controls, engine brake controls, lift axle controls, and more.

This manual serves as an invaluable resource for technicians, mechanics, and anyone working on the electrical systems of Peterbilt 379 and 379e trucks. Its comprehensive coverage and detailed schematics make troubleshooting and repair tasks significantly easier.

The Peterbilt 379 Model Electrical Wiring Schematics Manual is a comprehensive guide designed to assist technicians and mechanics in understanding and navigating the complex electrical system of the iconic Peterbilt 379 and 379e commercial trucks. These manuals are essential resources for troubleshooting electrical issues, performing repairs, and ensuring the safe and efficient operation of these vehicles. They provide detailed diagrams and explanations of the wiring harness, circuit configurations, fuse locations, and component connections throughout the truck's electrical system. From the engine control module (ECM) and instrument cluster to the lighting systems, air conditioning, and auxiliary systems, the schematics offer an in-depth visual representation of every electrical component and its relationship within the overall system.

The Peterbilt 379 Model Electrical Wiring Schematics Manual is not just a collection of diagrams; it is a valuable tool for understanding the intricate workings of a complex heavy-duty truck's electrical system. With its clear and concise information, it helps technicians identify and diagnose electrical faults, locate specific components, and perform repairs effectively. These manuals are crucial for maintaining the reliability and safety of Peterbilt 379 and 379e trucks, ensuring optimal performance and minimal downtime. The availability of these schematics empowers mechanics to approach electrical problems with confidence, saving time and resources while ensuring the long-term health and operation of these powerful workhorses. Whether it's a routine maintenance task or a complex electrical issue, the Peterbilt 379 Model Electrical Wiring Schematics Manual stands as an invaluable companion for those who work with these legendary trucks.