The electrical system of a modern heavy-duty truck is a complex network requiring precise power distribution and control. Among the most critical Sinotruk Howo parts, the Sinotruk Howo Control Block Right,Relay,Fuse assembly serves as the primary power distribution and switching hub for the vehicle’s cabin and key auxiliary systems. This integrated module consolidates fuses, relays, and control circuits into a single, organized unit, safeguarding electrical components from overloads and providing reliable switching for critical functions like lighting, ABS, air conditioning, and window controls. Ensuring this assembly is genuine and fully functional is paramount for vehicle electrical safety, reliability, and preventing costly downtime due to electrical faults.
The Sinotruk Howo Control Block Right,Relay,Fuse is a comprehensive electrical power center located within the truck’s cabin, typically on the right side. It is a modular assembly that houses the main fuse panel, a series of electromechanical relays, and the necessary wiring connectors to distribute and control electrical power throughout the vehicle’s accessory and safety systems.
This unit is responsible for protecting circuits with appropriately rated fuses (from 10A to 25A as per the list) for systems such as ABS (both truck and trailer), headlights (low and high beam), fog lamps, wipers, power windows, air conditioner, air dryer, seat heaters, and the instrument panel. Each fuse safeguards its circuit from short circuits and overloads.
The integrated relays (J1 through J11) act as remote-controlled switches, allowing low-current signals from the dashboard switches to safely control high-current devices like headlights, fog lights, and the air conditioner compressor. This design protects the delicate switch contacts and simplifies wiring.
The assembly also includes critical components like the high-amperage start relay (80A), mounting brackets, and connectors. For some configurations, it is associated with mounting options for ABS electronic control units (ECUs) from suppliers like WABCO or KNORR, making it a central part of the truck’s electronic architecture.
| No. | Part No. | Designation |
|---|---|---|
| 1 | AZ9719580002 | Control block right |
| 1—1 | AZ9719580002-1 | Control block right without relay |
| 1—2 | F1-1 | Fuse for seat adjusting |
| 1—3 | F1-2 | Fuse for start switch |
| 1—4 | F1-3 | Fuse for ABS of trailer |
| 1—5 | F1-4 | Fuse for cigar lighter left |
| 1—6 | F1-5 | Fuse for radio and cigar lighter right |
| 1—7 | F2-1 | Fuse for ECAS |
| 1—8 | F2-2 | Fuse for ABS(30#) |
| 1—9 | F2-3 | Fuse for ABS(30#) |
| 1—10 | F2-4 | Fuse for detrochananic window left |
| 1—11 | F2-5 | Fuse for detrochananic window right |
| 1—12 | F3-1 | Fuse for spare relay |
| 1—13 | F3-2 | Fuse for spare relay |
| 1—14 | F3-3 | Fuse for ABS(15#) |
| 1—15 | F3-4 | Fuse for ECAS(15#) |
| 1—16 | F3-5 | Fuse for 15# electroline |
| 1—17 | F4-1 | Fuse for steering lights |
| 1—18 | F4-2 | Fuse for 50belectroline |
| 1—19 | F4-3 | Fuse for electrothermal seat |
| 1—20 | F4-4 | Fuse for 15# electroline |
| 1—21 | F4-5 | Fuse for air dryer |
| 1—22 | F5-1 | Fuse for combination instrument and control block left |
| 1—23 | F5-2 | Fuse for wiper |
| 1—24 | F5-3 | Fuse for electroline of air conditioner |
| 1—25 | F5-4 | Fuse for low beam |
| 1—26 | F5-5 | Fuse for high beam |
| 1—27 | F6-1 | Fuse for position light |
| 1—28 | F6-2 | Fuse for electroline D˚ |
| 1—29 | F6-3 | Fuse for front fog lamp |
| 1—30 | F6-4 | Spare ftue |
| 1—31 | F6-5 | Spare ftue |
| 1—32 | J1 | Relay for steering lamp right |
| 1—33 | J2 | Relay for air dryer and electrothermal seat |
| 1—34 | J3 | Relay for air conditioner |
| 1—35 | J4 | Relay for high beam |
| 1—36 | J5 | Relay for fog lamp front |
| 1—37 | J6 | Relay for steering lamp left |
| 1—38 | J7 | Relay for wiper intermission control |
| 1—39 | J8 | Relay for low beam |
| 1—40 | J9 | Relay for position light |
| 1—41 | J10 | Spare relay |
| 1—42 | J11 | Spare relay |
| 2 | WG9100583049 | Start relay (80A) |
| 3 | Q150B0516 | Screw |
| 4 | Q40305 | Spring washer |
| 5 | Q340B05 | Nut |
| 6 | Q340B05 | Nut |
| 7 | Q40405 | Spring washer |
| 8 | J89100770103 | Line connector( I ) |
| 9 | J89100770104 | Line connector(II ) |
| 10 | Q150B0518 | Screw |
| 11 | Q41205 | Toothed washer |
| 12 | Q340B05 | Nut |
| 13 | A29719770040 | Bracket |
| 14 | WG9160580501 | ABS(45/4M)electrical control unit(WABCO) |
| 15 | A29718580002 | Option ECU bracket(WABCO) |
| 16 | WG9718580001 | Option ABS(45/4M)electrical control unit(KNORR) |
| 17 | A29718580003 | Option ECU bracket(KNORR) |
Our assembly is a genuine Sinotruk Howo part, providing the complete power distribution center as originally engineered. This ensures perfect compatibility with your truck’s wiring harness, correct fuse and relay ratings, and reliable performance. Using this integrated module avoids the risks of mismatched components and incorrect wiring that can lead to electrical failures.
The assembly includes all correctly rated fuses and high-quality relays to protect sensitive electronic systems like ABS, ECAS, and the instrument cluster. This prevents damage from voltage spikes and short circuits, ensuring the continuous operation of critical safety and comfort features, thereby reducing the risk of roadside breakdowns.
Having all major fuses and relays in one organized, labeled block makes diagnostic and repair work significantly easier for technicians. Replacing this entire assembly as a unit is often faster and more reliable than troubleshooting and replacing individual, scattered components, leading to reduced vehicle downtime.
A properly functioning fuse and relay block is fundamental to vehicle electrical safety. This genuine assembly ensures reliable connections, prevents overheating at terminals, and maintains the integrity of the entire electrical system. It directly contributes to the safe operation of lighting, braking aids (ABS), and driver comfort systems.
In summary, the Sinotruk Howo Control Block Right,Relay,Fuse is the cornerstone of your truck’s electrical system, managing power and signals for dozens of vital functions. Its failure can lead to a cascade of electrical problems. Regular visual inspection for corrosion, loose connections, or blown fuses is a key preventative maintenance step. When replacement is necessary—whether due to damage, corrosion, or upgrading—choosing this complete, genuine OEM assembly is the most reliable and efficient solution. It guarantees a perfect fit, restores factory-level safety and performance, and ensures all electrical systems operate in harmony. For fleet managers and repair shops, this module is an essential spare part to ensure electrical reliability and driver safety on every journey.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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