Dongfeng KR truck spare parts Roof harness assembly 3724040-C580E

Built to serve as the central connection hub for Dongfeng KR’s roof electrical devices, this harness assembly features a multi-branch design with optimized conductivity. Each wire uses 99.9% pure oxygen-free copper (OFC) with cross-sections ranging from 0.5mm² (for warning lights) to 2.5mm² (for air conditioners), minimizing DC resistance to ≤0.01Ω/m. This ensures stable power supply: the 2.5mm² branch delivers 15A continuous current for 12V roof AC units, while the 0.5mm² branches maintain consistent signals for GPS and communication antennas. The harness uses color-coded wires (red for positive, black for ground, blue for signals) and dedicated shielding for signal lines (aluminum foil + braid coverage ≥95%), reducing electromagnetic interference (EMI) from the engine and ensuring GPS positioning accuracy within 5m

Engineered for the exposed roof environment (direct sunlight, rain, dust), the harness assembly integrates multi-layer protective structures. Each wire is insulated with cross-linked polyethylene (XLPE) material, resisting 120℃ continuous temperature (from sun exposure) and -40℃ cold (northeast winters) without cracking. The outer sheath uses flame-retardant PVC (UL94 V-0 rating) with a thickness of 1.2mm, resisting UV aging (2000-hour QUV testing) and water intrusion (IP67 rating). Connectors feature double O-ring seals (Viton material) that prevent rainwater and dust from entering, while wire joints are sealed with heat-shrinkable tubes (adhesive-lined) to avoid corrosion. This protection ensures the harness operates reliably in diverse climates, from Xinjiang’s dusty deserts to southern China’s rainy seasons

Designed to endure Dongfeng KR’s road vibrations and roof maintenance operations, the harness assembly boasts exceptional structural durability. The main loom is bound with high-strength nylon cable ties (tensile strength ≥500N) and reinforced with fiberglass sleeves at stress points (e.g., branch junctions), preventing wire breakage from vibration (5-2000Hz, ISO 16750-3) after 500,000 cycles. The 16-pin main connector uses a locking mechanism that resists dislodgment from cab vibration, with a mating force of 8-12N per pin ensuring stable contact. Mounting clips are made of PA66+GF30 plastic, resisting impact from tools during maintenance and maintaining a secure hold on the roof panel. The harness’s bend radius ≥10mm prevents wire fatigue from repeated bending during roof component installation

Optimized for efficient fleet maintenance and repair, the harness assembly features a pre-assembled plug-and-play design. All branches are pre-terminated with dedicated connectors (matching roof AC, warning light, and antenna interfaces), eliminating on-site crimping or soldering. The 16-pin main connector plugs directly into the cab ECU, while 12 pre-installed mounting clips align with the roof’s original holes—requiring only a cable tie gun and screwdriver for installation. Clear labeling on each branch (“AC POWER”, “GPS SIGNAL”, “WARNING LIGHT”) prevents connection errors, and a printed length marker on the main loom ensures precise routing. Two technicians can complete the entire replacement process in 45 minutes—50% faster than non-pre-assembled harnesses—minimizing truck downtime for fleet operators