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Precision control of medium-load electrical circuits is essential for modern truck functionality. As a vital switching component among genuine Sinotruk howo parts, the 24V 70A Switched Relay, identified by OEM number LG9704580022, provides intelligent circuit management. This relay acts as a remotely controlled switch for systems like fans, heaters, or auxiliary lights. The genuine LG9704580022 is engineered for the 24-volt system of SINOTRUK Howo trucks. It ensures durable performance and protects control modules from high-current loads.
24 V 70A Switched Relay
Управляемое реле 24В 70А
Relé conmutado 24V 70A
The 24V 70A Switched Relay, part number LG9704580022, is an electromechanical or solid-state switch. It is “switched” by a low-current control signal from a computer (ECU) or switch. This signal activates the relay’s internal electromagnetic coil.
Once activated, the relay closes its high-current contacts. This completes the power circuit to a specific device. The LG9704580022 handles up to 70 Amps, making it suitable for substantial loads. It acts as a protective intermediary.
This design prevents high current from passing through delicate control wiring. It extends the life of switches and control modules. The genuine LG9704580022 is built for reliability in the vehicle’s electrical environment.
ECU-Compatible Control
Designed to be triggered by the truck’s Electronic Control Unit (ECU), enabling automated and intelligent control of electrical systems based on sensor input.
Robust 70A Load Capacity
With a 70-amp rating, the LG9704580022 reliably powers medium-to-high load devices like electric cooling fans, horn circuits, or auxiliary heating systems.
Fast and Reliable Switching
Provides instantaneous response to control signals, ensuring connected devices activate or deactivate immediately as required by the vehicle’s systems.
Compact and Secure Mounting
Features a standardized housing for easy installation in central fuse/relay boxes, ensuring secure connections and protection from the elements.
| Parameter / Feature | Specification / Description |
|---|---|
| OEM Part Number | LG9704580022 |
| Component Name | 24 V 70A Switched Relay |
| Brand & Application | SINOTRUK Howo, for ECU-controlled circuits (fans, glow plugs, etc.). |
| Primary Function | Remote switching of medium-high current circuits via a low-current control signal. |
| Voltage Rating | 24 Volts DC (Control and Load circuits). |
| Current Rating | 70 Amperes (Maximum continuous load current). |
| Contact Configuration | SPST (Single Pole, Single Throw) or SPDT (Single Pole, Double Throw). |
| Control Signal | Low-current (typically <1A) from a switch, sensor, or vehicle ECU. |
| Product Condition | New, 100% Genuine OEM Part. |
A failing switched relay, part LG9704580022, leads to specific system malfunctions. The device it controls will stop working entirely. For example, an engine cooling fan may not activate, leading to overheating.
Intermittent operation is another common symptom. The device works sporadically or only under certain conditions. You may hear a rapid clicking sound from the relay location. This indicates a failing coil or poor connection.
No audible click when the system should activate suggests a dead coil. Burnt plastic odor or visible melting around the relay housing are clear physical signs. Testing the LG9704580022 involves checking for control signal voltage.
Use a multimeter to verify power at the relay’s output terminal when activated. Always check related fuses and wiring before condemning the relay. Replacing a faulty LG9704580022 with a genuine part restores automated system control.
Replacing the LG9704580022 relay is a simple task with proper precautions. First, disconnect the vehicle’s negative battery terminal. Locate the relay in the under-hood or dashboard fuse/relay box. Consult the vehicle’s diagram.
Firmly pull the old relay straight out of its socket. Inspect the socket pins for any corrosion, bending, or discoloration. Gently clean the socket if necessary to ensure a good connection for the new part.
Align the new genuine LG9704580022 relay correctly with the socket. Push it down firmly until it seats completely. Reconnect the battery and test the system’s operation. Ensure the controlled device now functions as intended.
Never force a relay into its socket. If it doesn’t fit easily, check the orientation. Using the correct OEM part number LG9704580022 guarantees proper pin configuration and electrical characteristics for the circuit.
Modern trucks rely on networked electronic control. The LG9704580022 relay is a key output device for the ECU. The ECU makes decisions based on data from temperature, pressure, and speed sensors.
When a specific condition is met, the ECU sends a ground or power signal to the relay coil. This automated control improves efficiency, safety, and driver convenience. It is integral to modern vehicle design.
A reliable relay like LG9704580022 ensures these automated processes work flawlessly. Its failure can disrupt critical functions like engine temperature management or pre-heating systems in cold climates.
A “switched” relay like LG9704580022 is designed for intermittent duty. It is activated by an external signal, not a constant voltage. This differs from a “constant duty” relay used for always-on circuits.
Its internal components are optimized for frequent cycling. The contact material resists wear from repeated arcing. The coil is designed for the specific voltage and current profile of the control module’s output.
Using an incorrect relay type can lead to premature failure or poor contact. The genuine LG9704580022 is specified for its particular control and load characteristics. This ensures compatibility and long-term reliability.
The 24V 70A Switched Relay, OEM number LG9704580022, is a crucial interface between your truck’s brain (ECU) and its electrical muscle. Its reliable operation enables automated, efficient, and safe control of vital systems.
Investing in the genuine LG9704580022 part guarantees the switching speed, load capacity, and durability required for modern electronic vehicle management. Ensure your SINOTRUK Howo’s automated systems perform as designed by choosing authentic OEM relays.
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