The part is the comprehensive overhead electrical and storage system installed in the HOWO MAX 4X2 cab, integrating the roof harness, electrical resistance, and storage components into a single, well organized assembly. This ceiling appliance ensures reliable power distribution to roof mounted lights, sensors, and accessories, while also providing secure, convenient storage solutions. When you choose authentic Howo Parts, this ceiling appliance guarantees OE fitment and long term reliability. Below are detailed descriptions of every component included with this ceiling appliance assembly.
Fifteen plastic fastening belts of size A5*280 are supplied to secure the wiring harnesses and cables within The part. These ceiling appliance belts are made from high strength nylon PA66, rated for temperatures from 40°C to +85°C, with a tensile strength of 80 N. The A5*280 designation indicates a width of 5mm and a length of 280mm. These ceiling appliance belts prevent chafing and movement of the roof harness, ensuring reliable electrical connections.
The 120W electric resistance is a heating element integrated into The part for demisting or cabin comfort applications. This ceiling appliance resistance operates at 24V and draws 5A, generating controlled heat to prevent condensation on the windshield or to supplement cabin heating. The resistance element is encapsulated in a corrosion resistant housing, ensuring long service life within The part.
The ceiling harness is the primary wiring loom that distributes power and signals to all roof mounted electrical components. This ceiling appliance harness is made from cross linked polyethylene (XLPE) insulated wires, rated for 105°C continuous operation. The ceiling harness includes connectors for the interior lights,
electric resistance, sunroof controls (where fitted), and roof storage lighting. It is pre formed to match the exact routing of the HOWO MAX cab roof, with integrated clips that snap into the fastening belts. A properly installed ceiling harness ensures that every electrical device in The part receives stable power without risk of short circuits.
The glove box blanking cap is a precision moulded plastic cover that seals an unused port on The part storage compartment. This ceiling appliance cap is made from impact resistant ABS plastic, finished in the same texture as the original interior trim. The cap snaps securely into place with integrated retaining clips, preventing dust and debris from entering the storage area. When The part is installed without the optional overhead storage box, this blanking cap provides a clean, finished appearance.
Ceiling appliance – genuine HOWO overhead electrical and storage kit for MAX 4X2
This ceiling appliance kit includes the harness, heating resistance, fastening belts, and blanking cap – everything needed for a complete roof electrical installation. No extra components are required to restore or upgrade The part.
The ceiling harness uses cross-linked polyethylene insulation rated for 105°C, withstanding the extreme temperatures trapped in the roof cavity. This ceiling appliance harness ensures reliable power distribution for the life of the vehicle.
The 120W electric resistance provides effective demisting and supplemental cabin heat. This ceiling appliance component is thermostatically controlled, ensuring it activates only when needed, preserving battery life.
Every component of this ceiling appliance is manufactured to SINOTRUK’s exact specifications for the HOWO MAX 4X2 cab. The harness routing, belt lengths, and cap dimensions match the original factory parts.
The part system in the HOWO MAX 4X2 integrates all electrical and storage functions in the cab roof. The ceiling harness connects the main vehicle electrical system to the roof components, carrying power to the interior lights, electric resistance, and any optional sunroof or roof storage lighting. The plastic fastening belts secure the harness to the roof structure, preventing chafing and vibration damage. The 120W electric resistance is controlled by a dedicated switch on the dash panel or automatically via the climate control system; when activated,
it generates heat that rises to the windshield, preventing fogging. The glove box blanking cap provides a clean, finished appearance when the overhead storage compartment is not fitted. A properly functioning ceiling appliance ensures that the driver has clear visibility in cold conditions, adequate interior lighting, and a well organized cab interior. Regular inspection of The part harness and belts is recommended during routine cab maintenance to ensure all connections remain secure.
Before installing The part, disconnect the battery and remove the headliner. Route the ceiling harness along the factory specified path on the roof structure, securing it with the fifteen plastic fastening belts at intervals of approximately 200mm. Connect the harness connectors to the interior lights and the electric resistance. Install the electric resistance into its mounting position using the factory brackets.
If the overhead storage box is not being installed, snap the glove box blanking cap into the storage port. Ensure all fastening belts are pulled tight and any excess belt length is trimmed. Reinstall the headliner, reconnect the battery, and test all ceiling appliance functions: interior lights, resistance (if connected), and any roof mounted switches. The part installation is now complete.
If The part interior lights do not function, check the harness connectors for corrosion and ensure the fastening belts have not been pulled so tight that they have damaged the insulation. If the electric resistance does not heat, verify the fuse (typically 10A) and the switch circuit. A flickering light in The part often indicates a loose connector;
inspect the harness connection at the light fixture. If the glove box blanking cap has fallen off, the retaining clips may be broken; replace the cap with a new one. If the ceiling harness shows signs of chafing against the roof structure, additional fastening belts may be needed to secure it properly. Never attempt to repair a damaged ceiling harness with electrical tape; replace the section or the entire harness.
The part components require minimal maintenance but should be inspected annually or whenever the headliner is removed. Check the ceiling harness for signs of chafing, cracking, or heat damage.
Verify that all plastic fastening belts are secure and not brittle; replace any that show signs of aging. The electric resistance should be tested for proper operation before the cold season. If the glove box blanking cap is loose, replace it. Keeping The part clean and free from dust accumulation will extend its service life. Always use genuine HOWO components when replacing any part of The part to ensure proper fit and function.
This ceiling appliance kit is specifically designed for the HOWO MAX 4X2 tractor cab, fitting all production years from 2018 onward. The ceiling harness is compatible with both standard and high roof cab variants.
The glove box blanking cap is used on vehicles without the optional roof storage box. This ceiling appliance kit is also compatible with SITRAK C7H and HOWO T7H models sharing the same cab architecture. It is not compatible with older HOWO A7 or WD615 cab versions, which use a different harness routing and connector types. Always verify your cab type and production year before ordering this ceiling appliance kit.
Aftermarket ceiling harnesses often use lower grade PVC insulation that cracks under heat, leading to short circuits that can cause electrical fires. Generic fastening belts may not have the correct tensile strength or UV resistance, snapping after a few years of exposure. Non genuine electric resistances may have incorrect wattage,
either providing insufficient heat or overloading the circuit. The glove box blanking cap in copy kits may not fit correctly, allowing dust and debris into the roof cavity. Genuine HOWO ceiling appliance components are manufactured to SINOTRUK’s exact specifications, using high temperature XLPE wire, certified PA66 nylon belts, and correctly rated resistance elements. The small additional cost of a genuine ceiling appliance is insignificant compared to the cost of a cab fire or electrical system failure.
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