The part is the central electrical distribution and protection unit for the HOWO MAX 4X2 tractor, consolidating seven individual circuits into a single, serviceable module. This 7-circuit fuse block integrates the main fuse assembly, a dedicated mounting bracket, and all necessary fasteners to ensure reliable power delivery and overcurrent protection for the vehicle’s critical electrical systems. When you choose authentic Howo Parts, this 7-circuit fuse block guarantees OE fitment, precise circuit management, and long term electrical safety. Below are detailed descriptions of every component included with this 7-circuit fuse block assembly.
The 7-way safety device assembly is the main fuse and relay module that houses seven independent circuits, each protected by a blade type fuse and controlled by a dedicated relay. This 7-circuit fuse block component is manufactured from high temperature thermoplastic with gold plated terminals to ensure low resistance and corrosion free connections.
The assembly includes a transparent cover that allows visual inspection of fuse status, and it is designed to withstand the harsh under hood environment,
with an operating temperature range of -40°C to +125°C. The 7-way safety device assembly is pre wired with colour coded leads that match the HOWO MAX 4X2’s original harness, making installation straightforward and error free. The module’s layout separates critical circuits such as headlights, wipers, ABS, and engine management, providing both convenience and safety.
The 7-way fuse box bracket is a robust steel mounting plate that securely attaches the fuse block to the chassis. This 7-circuit fuse block bracket is precision stamped from 3mm thick steel with a zinc nickel coating to resist corrosion.
It features captive nuts that simplify assembly and alignment holes that match the original factory mounting points. The bracket provides a stable platform for the fuse block,
isolating it from vibration and ensuring that the electrical connections remain secure. This component is essential for the long term reliability of The part, as it prevents movement that could stress the wiring or connectors.
Two M6 hexagon flange bolts are supplied to secure the fuse block bracket to the vehicle’s firewall or inner fender panel. These 7-circuit fuse block bolts are made from grade 8.8 steel with a zinc plated finish, offering excellent tensile strength and corrosion resistance.
The integral flange distributes the clamping load evenly, eliminating the need for separate washers and simplifying installation. Proper torquing of these bolts ensures that The part remains firmly attached, even under the severe vibration of heavy truck operation.
Two M6 hex flange nuts are used in conjunction with the M6 bolts to secure the fuse block bracket. These 7-circuit fuse block nuts feature an integral flange that provides a large bearing surface and a self locking action that resists loosening.
They are made from zinc plated steel and are torqued to 10 Nm, ensuring a secure, vibration proof connection. The flange design eliminates the need for separate washers, reducing assembly time and part count.
Two M10 hexagon flange bolts are used for the main mounting of The part assembly to the chassis. These larger bolts are grade 8.8 and torqued to 40 Nm, providing the high clamping force required for the heavier fuse block.
The flange head eliminates the need for washers and ensures even pressure distribution across the bracket surface. These 7-circuit fuse block bolts are essential for maintaining the structural integrity of the fuse block mounting.
Two M10 flange nuts are used with the M10 bolts to secure The part bracket. These nuts are made from grade 8.8 steel with a zinc plated finish and feature an integral flange for load distribution and self locking.
Torqued to 40 Nm, they provide a vibration proof fastening that maintains the alignment and stability of The part assembly. The flange nut design simplifies installation and ensures consistent clamp force, which is critical for the electrical grounding and mechanical integrity of the fuse block.
7-circuit fuse block – genuine HOWO complete power distribution and safety device kit for MAX 4X2
This 7-circuit fuse block provides dedicated overcurrent protection for seven critical circuits, preventing electrical fires and component damage. The part design ensures that each circuit is independent, so a fault in one does not affect the others.
The part uses gold plated terminals that resist corrosion and maintain low contact resistance over time. This ensures that The part delivers consistent power to all connected devices, reducing the risk of voltage drop and intermittent faults.
The part is supplied with high strength flange bolts and nuts that provide a secure, rattle free attachment. The M6 and M10 fasteners are grade 8.8, torqued to specification, ensuring that The part remains stable even on rough roads.
This 7-circuit fuse block is designed to match the original vehicle specifications, with the correct bracket dimensions and connector positions. Installation of The part is straightforward, requiring no modifications to the existing wiring harness.
The part is an essential component of the vehicle’s electrical architecture, providing centralised protection and power distribution for seven key circuits. These circuits typically include the main lighting, windscreen wipers, ABS, engine control unit, horn, auxiliary power outlets, and trailer lighting.
The part uses standard blade type fuses that are easily replaceable, and each circuit is rated for a specific current capacity, ranging from 5A to 30A. The integrated relays allow for high current switching without overloading the ignition switch.
The transparent cover of The part allows for quick visual inspection, and a diagram on the cover identifies each fuse’s function. Properly maintaining The part ensures that the vehicle’s electrical systems function reliably, reducing the risk of unexpected breakdowns.
Before installing The part, disconnect the battery negative terminal to prevent any electrical shorts. Locate the original fuse block position and remove the old unit. Clean the mounting surface. Attach the 7 way fuse box bracket to the vehicle using the M10 bolts and nuts, torquing to 40 Nm. Secure the 7 way safety device assembly to the bracket using the M6 bolts and nuts, torquing to 10 Nm.
Connect the vehicle’s wiring harness to the corresponding terminals on The part, ensuring each connector clicks into place. Install the correct fuses according to the diagram provided on the cover.
Reconnect the battery and test each circuit to verify proper operation. The part is now ready for service. If any circuit does not function, check the fuse and the connections.
If a circuit protected by The part fails, first inspect the corresponding fuse. A blown fuse indicates an overload or short circuit in that circuit; replace with the correct amperage fuse. If the fuse blows immediately, there is a direct short;
inspect the wiring for chafing or damage. If The part does not power any circuit, check the main power feed and ground connections. Loose terminals can cause intermittent failures; ensure all connections are tight. If the relays in The part do not click when activated, test the relay coil with a multimeter; replace if faulty. Always use genuine replacement fuses of the correct rating for The part.
The part requires regular inspection. Every 50,000 km or annually, check the fuse block cover for cracks and the terminals for corrosion. Clean the terminals with contact cleaner if needed. Ensure all fuses are secure and not loose.
Test each circuit by operating the corresponding function (lights, wipers, etc.) to confirm proper operation. Replace any blown fuses immediately. The part is designed for long term reliability, but proactive maintenance can prevent electrical failures and extend the life of the vehicle’s electrical system.
This 7-circuit fuse block is specifically engineered for the HOWO MAX 4X2 tractor and is compatible with all production years from 2018 onward. It is designed to replace the original fuse block without any modifications.
The part is also suitable for SITRAK C7H and HOWO T7H models that share the same electrical architecture. It is not compatible with older WD615 or A7 models, which use a different fuse block layout and connector type. Always verify your vehicle’s electrical system before ordering this 7-circuit fuse block.
Aftermarket 7-circuit fuse blocks often use lower quality plastics that become brittle under heat, leading to cracked housings and exposed terminals. Generic terminals may corrode, causing high resistance and voltage drops that can damage sensitive electronics. Non genuine mounting brackets may not align correctly, stressing the wiring harness and connectors.
A faulty 7-circuit fuse block can lead to intermittent electrical faults, component damage, or even electrical fires. Genuine HOWO 7-circuit fuse block components are manufactured to SINOTRUK’s exacting standards,
using high temperature thermoplastics, gold plated terminals, and precision formed brackets. The small additional cost of a genuine 7-circuit fuse block is negligible compared to the safety of the vehicle and the reliability of its electrical systems. For fleet operators, using genuine 7-circuit fuse blocks ensures consistent performance and reduces the risk of roadside breakdowns caused by electrical failures.
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