The VCU Wiring Harness is the central nervous system of the engine control unit, transmitting critical signals between the VCU, sensors, injectors, and actuators. This comprehensive kit includes the main wiring harness, all necessary brackets, fasteners, and cable ties for a complete installation on the Sitrak C7H.
This VCU Wiring Harness is specifically designed for C7 trucks meeting China IV/V emission standards, without the oil level sensor. It ensures reliable communication between the engine control unit and all peripheral components, guaranteeing optimal engine performance and diagnostics. For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models.
The VCU Wiring Harness is manufactured with high-quality copper conductors, durable insulation, and sealed connectors to withstand the harsh under-hood environment. Its precise routing and integrated brackets ensure that the wiring is securely fastened, preventing chafing and short circuits.
Whether you are replacing a damaged harness or performing an engine overhaul, this VCU Wiring Harness kit delivers factory-quality components and a straightforward installation. This VCU Wiring Harness is the definitive choice for operators who demand reliable electrical connectivity and long-term durability.
The Injector Wiring Harness is a dedicated sub-harness that connects the six injectors to the main VCU harness. It features high-temperature resistant wires and sealed connectors that withstand the extreme heat and vibration of the engine. In the VCU Wiring Harness system, this harness ensures precise injector firing signals, critical for fuel metering and emission control.
Its length is precisely matched to the C7H engine layout, and the connectors are colour-coded for easy identification. The wires are shielded to prevent electromagnetic interference, guaranteeing signal integrity even in the noisy environment of the engine bay.
This high-strength M6 flange bolt is used throughout the VCU Wiring Harness installation to secure brackets and harness supports. Manufactured from grade 10.9 alloy steel with a zinc-nickel coating, it offers excellent corrosion resistance and clamping force. Its 16mm length makes it suitable for thin bracket attachments, and the integrated flange eliminates the need for a separate washer, simplifying assembly.
These bolts are critical for holding the injector wiring harness and other components firmly in place, preventing movement that could cause chafing or connector damage. The MAN183-B1 specification guarantees compatibility with the C7H chassis.
This is the main harness of the VCU Wiring Harness system, designed for C7 trucks meeting China IV and V emission standards. It does not include the oil level sensor circuit, making it suitable for applications where the oil level sensor is not required. The harness integrates all necessary connections for the VCU, sensors, injectors, actuators, and power distribution.
It is manufactured with high-grade copper wire, cross-linked polyethylene insulation, and sealed connectors that resist moisture and corrosion. Each wire is color-coded and numbered for easy troubleshooting and installation, reducing the risk of misconnection.
This standard hexagon head bolt is used for light-duty fastening within the VCU Wiring Harness assembly. Made of grade 8.8 steel with a zinc plating, it provides reliable clamping for smaller brackets and covers. Its hex head allows for easy installation with standard wrenches, and its compact size makes it suitable for confined spaces.
In the VCU Wiring Harness kit, this bolt is typically used to secure sensor brackets or junction box covers, ensuring they remain firmly attached despite engine vibration.
This wave spring washer is used in the VCU Wiring Harness to maintain tension on fasteners, preventing loosening due to vibration. Its wavy profile provides a spring effect that compensates for thermal expansion and shock loads, ensuring consistent clamping force over time. Made from high-carbon spring steel with a corrosion-resistant coating, it is durable and reliable.
In practice, it is often used alongside the hexagon head bolt to secure electrical connectors or small brackets, enhancing the reliability of the VCU Wiring Harness assembly.
This bracket is designed to secure the wiring harness to the engine block or chassis frame, preventing it from sagging or rubbing against moving parts. In the VCU Wiring Harness system, it is made of zinc-plated steel with a rubber-lined cushion that absorbs vibration and protects the wires from abrasion. Its adjustable design allows for precise positioning, ensuring optimal routing and strain relief.
Proper installation of these brackets is essential for maintaining the integrity of the VCU Wiring Harness, especially in off-road or high-vibration applications.
This larger M8 flange bolt is used for securing heavier brackets and main harness supports. Grade 10.9 with a zinc-nickel coating, it provides higher clamping force and corrosion resistance compared to smaller bolts. Its 16mm length is suitable for thicker mounting flanges, and the integrated flange eliminates the need for a separate washer.
In the VCU Wiring Harness kit, these bolts are commonly used to attach the main harness brackets to the engine block, ensuring the harness remains securely anchored.
This bracket is the primary support structure for the VCU Wiring Harness, holding the main trunk of cables and distributing its weight evenly. It is fabricated from heavy-gauge steel with a corrosion-resistant powder coating, featuring multiple mounting points and integrated cable tie slots. Its design ensures that the harness is routed away from heat sources and moving parts, reducing the risk of damage.
The bracket’s precise geometry matches the C7H chassis, allowing for a direct bolt-on installation without modification.
This specialized bracket is designed to secure the common rail pressure sensor harness, preventing it from interfering with other components. Made of zinc-plated steel with a rubber-coated edge, it protects the wires from sharp edges and ensures that the sensor connector remains properly seated. In the VCU Wiring Harness system, this bracket is critical for maintaining accurate pressure readings by preventing unnecessary movement.
This M6 flange bolt is used for slightly thicker brackets compared to the 16mm version. With a 20mm length, it accommodates deeper mounting points, such as those found on the common rail sensor bracket. Grade 10.9 with a zinc-nickel coating, it provides reliable clamping and corrosion resistance.
This large flat washer is used under bolt heads to distribute load and protect the surface of plastic brackets. It conforms to GB/T96.1 standards and features a zinc-plated finish. In the VCU Wiring Harness, it is often used with M6 bolts to prevent the bracket from cracking under clamping pressure.
This stud bolt is used as a mounting post for harness brackets or other accessories. Manufactured from grade 8.8 steel with a zinc plating, it has a M10 thread and a length of 47mm. In the VCU Wiring Harness system, it provides a fixed anchor point, allowing components to be quickly installed or removed without disturbing the alignment.
This locking washer is a split-ring type that provides a mechanical lock against loosening. Used with the stud bolt or other fasteners, it prevents rotation due to vibration. In the VCU Wiring Harness assembly, it adds an extra layer of security to critical mounting points.
This additional harness bracket is used for routing smaller sub-harnesses or securing individual wires. It is similar in design to the pipe bracket but smaller and more flexible. In the VCU Wiring Harness, it is typically used to manage the injector wiring or sensor leads, ensuring they are neatly routed and protected.
This M8 flange bolt is used for mounting the main harness bracket to the chassis. With a 25mm length, it provides ample thread engagement for secure attachment. Grade 10.9 with a zinc-nickel coating, it offers high strength and corrosion resistance.
This flat washer is used under the M8 flange bolt to distribute load and prevent damage to the bracket. It conforms to GB/T97.1 standards with a hardness of 200HV, ensuring durability and consistent clamping performance.
This tie is designed for securing individual wires or small bundles. Made of UV-stabilized nylon, it provides a secure hold without damaging the insulation. In the VCU Wiring Harness system, it is used to organize wires near connectors or to attach them to brackets, preventing chafing and maintaining a clean appearance.
This general-purpose cable tie is used for bundling and securing wiring harnesses. It is made of nylon with a self-locking mechanism, providing a strong and reliable hold. In the VCU Wiring Harness kit, it is available in two sizes: a standard type (B5*180) and a standard length for general use.
This specific fastening tape has a width of 5mm and a length of 180mm, making it ideal for smaller bundles or tight spaces. It offers the same reliable locking performance as the standard tape but in a more compact size. It is frequently used in the VCU Wiring Harness to secure the injector sub-harness and sensor leads.
This tie is designed to secure two parallel wires or bundles simultaneously. It features two independent loops that can be tightened separately, allowing for organized routing of multiple circuits. In the VCU Wiring Harness, it is used to keep adjacent wires neat and prevent tangling.
This robust tie is used for heavy-duty bundling or where extra strength is needed. It has a wider profile and higher tensile strength compared to standard ties. In the VCU Wiring Harness system, it is often used to secure the main harness trunk or to attach heavy cables to the chassis.
The VCU Wiring Harness ensures consistent and accurate signal transmission between the engine control unit and all sensors and actuators. This reliability is critical for optimal engine performance, fuel efficiency, and emission control.
This VCU Wiring Harness kit includes every bracket, bolt, washer, and cable tie required for a full installation. No additional parts are needed, saving time and ensuring compatibility.
All wiring, connectors, and mounting hardware are manufactured from high-quality, corrosion-resistant materials. This ensures that the VCU Wiring Harness withstands engine heat, vibration, and environmental exposure for years.
The VCU Wiring Harness is manufactured to the exact OEM specifications, guaranteeing a perfect fit for the Sitrak C7H. The pre-cut wires and pre-formed brackets simplify installation, reducing downtime and labor costs.
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