Dongfeng KL truck parts Right door wiring harness assembly 3724055-C3301

Built as the “nerve network” of the right door, this harness features precision wiring optimized for fast, interference-free signal transmission. It uses high-purity oxygen-free copper (OFC) conductors with cross-sectional areas of 0.3-2.5mm²—matched to the power demands of each component—achieving conductivity ≥98% IACS and voltage drop ≤0.06V/m. Signal wires for sensitive components (e.g., mirror adjustment sensors) are twisted in pairs (twist pitch 20mm) and shielded with aluminum foil, reducing electromagnetic interference (EMI) by 75% to prevent erratic window or lock operation. Power wires for the window motor (2.5mm²) include dedicated fuses (15A) to avoid overloading. The harness’s branch design follows the right door’s internal contour, with pre-cut lengths that eliminate redundant wiring and simplify installation

Engineered to withstand repeated door opening/closing cycles (up to 100,000 times), the 3724055-C3301 harness features a flexible, fatigue-resistant design. The critical section (between door and cab) uses a spiral-wound nylon protective tube with a flexible rubber core, allowing ±90° bending without wire damage. Wires are insulated with thermoplastic elastomer (TPE) material—more flexible than standard PVC—that remains pliable in temperatures from -40℃ to 125℃, avoiding brittleness in cold weather. The harness is secured with flexible cable ties (nylon 66) that absorb vibration, preventing wire abrasion against metal door components. A reinforced strain relief at the connector ends distributes stress during door movement, avoiding terminal pull-out—a common cause of door function failure

Optimized to endure the harsh environment of truck doors (exposed to rain, dust, and diesel fumes), the harness features comprehensive protective measures. All connectors are IP67-rated, with HNBR rubber seals that block water and dust ingress—passing 1200-hour neutral salt spray testing (ASTM B117) with no corrosion. The main harness is wrapped in a wear-resistant polyester braid (density 18×18 strands/cm²) that resists scratches from door panels or tools. Terminals are tin-plated (5μm thickness) and feature a locking design to ensure secure contact, even during vibration. The TPE insulation resists diesel fuel, cleaning agents, and UV radiation, maintaining electrical integrity in coastal, snowy, or construction environments. These protections extend the harness’s service life by 50% compared to non-OE alternatives

This right door wiring harness is designed for efficient installation and long-term cost savings for Dongfeng KL operators. Pre-assembled connectors and labeled branches (e.g., “Window Motor,” “Lock Actuator”) allow a single technician to complete replacement in 1 hour—60% faster than custom-wired solutions. The OE-compatible design ensures perfect integration with the BCM, avoiding the electrical malfunctions (e.g., unresponsive windows, faulty locks) of aftermarket harnesses that cost $400+ to repair. The durable structure reduces replacement frequency, with a service life of ≥250,000km—three times that of cheap alternatives. By ensuring reliable door functions, it prevents security risks (unlocked doors) and driver inconvenience, improving fleet productivity. Backed by a 2-year/200,000km Dongfeng warranty, it provides predictable maintenance expenses and peace of mind for fleet managers