| No. | Part No. | Name |
|---|---|---|
| 1 | 812W25503-6027 | Power Switch |
| 2 | 752-25455-6311 | T5G Electromagnetic Main Power Switch Cab Additional Wire |
| 3 | 752-25455-6322 | C7H Electromagnetic Main Power Switch Power Additional Harness (New Structure/850) |
The Power Switch is a dashboard‑mounted rocker switch that provides the driver with manual control over the Electromagnetic Main Power Switch. When activated, it sends a signal to the remote solenoid to either connect or disconnect the battery from the vehicle’s electrical system. The switch features a positive detent action and an integrated LED indicator that shows the current state of the main power relay, ensuring the driver is always aware of the system’s status.
This dedicated wiring harness is designed to connect the dashboard switch to the electromagnetic solenoid located in the engine bay or battery compartment. It is specifically configured for the T5G cab but is also compatible with the C7H with minor routing adjustments. The wire is constructed with high‑temperature, oil‑resistant insulation and features pre‑terminated connectors for a secure, plug‑and‑play installation. It ensures reliable signal transmission for the Electromagnetic Main Power Switch, even in the harsh under‑dash environment.
This power harness is specifically engineered for the C7H’s new structure, providing a direct 850mm extension from the battery positive terminal to the electromagnetic switch solenoid. It is made from heavy‑gauge copper cable with a cross‑section of 25mm², capable of handling the full starting current of the engine. The harness includes a waterproof fuse holder and ring terminals that match the battery and solenoid studs. This component is critical for the proper operation of the Electromagnetic Main Power Switch, as it carries the high current needed to engage the solenoid reliably.
Our Electromagnetic Main Power Switch is manufactured to Sinotruk’s original specifications, ensuring seamless integration with the C7H electrical system. The switch, cab wire, and power harness are all designed to match the factory connectors and mounting points, making installation straightforward.
The remote disconnect capability allows the driver to cut all power to the vehicle in an emergency, reducing the risk of electrical fires and theft. The Electromagnetic Main Power Switch also prevents battery drain during long‑term parking, preserving starting power.
This kit includes the dashboard switch, the cab additional wire, and the dedicated power harness for the new C7H structure. Everything you need for a full retrofit or replacement is included, eliminating the need to source separate components.
The solenoid contacts are rated for continuous current of 200A and peak currents of 1000A, making them suitable for the largest diesel starters. The harness uses high‑quality cross‑linked polyethylene insulation that withstands engine bay temperatures and chemical exposure.
The Electromagnetic Main Power Switch is a remote‑controlled battery isolation device that gives the driver the ability to disconnect the battery from the vehicle’s electrical system from inside the cab. It is an essential safety and security feature for heavy‑duty trucks, providing a convenient way to prevent electrical fires, theft, and parasitic battery drain.
The system consists of three main components: the dashboard‑mounted Power Switch, the T5G Electromagnetic Main Power Switch Cab Additional Wire, and the C7H Electromagnetic Main Power Switch Power Additional Harness. The switch sends a low‑current control signal through the cab wire to the solenoid, which then opens or closes the high‑current circuit between the battery and the starter/alternator.
The Power Switch is designed to be mounted in the standard dashboard switch blank, providing a clean, factory‑look installation. It features a momentary push‑button action – pressing once toggles the system on or off, with an internal latching circuit that maintains the state even after the button is released. The integrated LED provides a clear visual indication of the power status.
The T5G cab additional wire is a pre‑assembled cable with a length of approximately 2 meters, fitted with a 2‑pin connector on the switch end and a 2‑pin connector on the solenoid end. It is shielded with a flexible, abrasion‑resistant loom and includes a grounding terminal for the solenoid control circuit. This wire is compatible with both T5G and C7H models, making it a versatile spare part.
The power harness for the C7H new structure is specifically engineered for the revised battery box layout. It is 850mm long and features a 200A mega‑fuse holder integrated into the positive cable. This fuse provides protection against short circuits, and the harness is terminated with heavy‑duty ring terminals that fit the battery post and solenoid stud. The cable is made from pure copper with a 25mm² cross‑section, ensuring minimal voltage drop under high load.
A failing Electromagnetic Main Power Switch can cause intermittent starting issues, as the solenoid contacts may become pitted or burnt. Replacing the entire system with our genuine kit restores reliable operation and eliminates the frustration of unexpected electrical failures.
Installation is straightforward and can be completed with basic hand tools. Disconnect the battery negative terminal, remove the old switch and harness, and install the new components in the reverse order. The plug‑and‑play connectors make the process quick and error‑free.
We recommend testing the Electromagnetic Main Power Switch after installation by turning the ignition on and verifying that the LED illuminates and the starter receives power. Then, turn the switch off and confirm that all electrical systems are de‑energised.
This system is particularly useful for vehicles that are stored for extended periods, as it eliminates parasitic drain from clocks, memories, and alarm systems. It also adds a layer of security, as the vehicle cannot be started without first activating the switch from inside the cab.
The Electromagnetic Main Power Switch is also a required component in many fire safety regulations for commercial vehicles, as it allows emergency responders to quickly cut power in the event of an accident.
All components in our kit are manufactured with high‑quality materials to ensure long‑term reliability. The switch contacts are gold‑plated for corrosion resistance, and the solenoid is sealed against moisture and dust.
We back our Electromagnetic Main Power Switch with a 12‑month warranty against manufacturing defects. Our technical support team is available to assist with any installation or troubleshooting questions.
We ship worldwide with tracking information. Expedited shipping is available for urgent orders. Use the Send Email or Get Quotation buttons to request a personalised quote.
Choosing genuine Electromagnetic Main Power Switch components ensures that your C7H maintains its original safety and performance standards. Aftermarket alternatives may not provide the same level of current handling or durability.
We recommend periodic inspection of the power harness and solenoid connections to ensure they remain clean and tight. Corrosion or loose terminals can cause high resistance and reduce the effectiveness of the switch.
The Electromagnetic Main Power Switch is also compatible with auxiliary batteries and dual‑battery systems, as it can be wired to isolate the entire battery bank. This is useful for vehicles with sleeper cabs that have separate battery banks.
We maintain a large inventory to ensure fast dispatch, even for bulk orders. Contact our sales team for volume pricing and customised logistics solutions.
Thank you for considering our Electromagnetic Main Power Switch for your Sitrak C7H. We are confident that our genuine OEM product will meet your expectations for quality, reliability, and safety.
The Electromagnetic Main Power Switch is a simple yet vital upgrade that provides peace of mind and protection for your investment. Order yours today and enjoy the convenience of remote battery isolation.
We offer competitive pricing and fast shipping. Contact us today to place your order or for any technical questions.
The Electromagnetic Main Power Switch is a testament to Sinotruk’s commitment to safety and innovation, and we are proud to offer it to our customers.
Don’t settle for aftermarket substitutes that may compromise performance. Choose the genuine Electromagnetic Main Power Switch and experience the difference that OEM quality makes.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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