Trailer wiring harnesses ensure the proper transmission of signals between the towing vehicle and trailer, including brake lights, turn signals, and reverse lights. JinHai’s wiring harnesses utilize abrasion-resistant PVC protective material and tinned copper terminals. They comply with the SAE J1128 standard and are typically compatible with various connector types, including 4-, 5-, and 7-pin connectors.
![[RV7WROJ-096] 8ft 7-Wire Trailer Wiring Harness](https://jinhaitrd.com/wp-content/uploads/2025/08/RV7WROJ-096-8ft-7-Wire-Trailer-Wiring-Harness.png "[RV7WROJ-096] 8ft 7-Wire Trailer Wiring Harness")
The trailer wiring harness’s high flexibility makes it suitable for use around trailer articulation bends. Its highly visible orange sheath and modular plugs allow for quick replacement and easy maintenance. Its high flexibility also makes it suitable for a wide range of applications. In commercial trailers, it serves as a critical link between freight trucks and RV towing systems. In construction machinery, it ensures accurate and stable signal output for excavators and loaders during operation. In agricultural machinery, it ensures stable power output when powering tractors and implements.
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Adhering to IPC/WHMA-A-620 standards, we ensure reliability and performance in each product.
The trailer wiring harness is the critical electrical bridge connecting the tractor and trailer, serving a wide range of applications. Key scenarios include:
Road transport: Trucks towing vans and flatbeds
Construction operations: Towing construction equipment and mobile generators
Leisure and recreation: Passenger vehicles towing RVs, boat trailers, and horse trailers
Agriculture: Tractors towing farm implements and grain trucks
It ensures the trailer’s brake lights, turn signals, taillights, and auxiliary equipment operate synchronously with the tractor, making it a crucial component for road safety and operational safety.
How to handle quality issues or returns?
At JinHai, if there are any quality issues with the goods we ship, we generally handle them in the following three ways:
If the product cannot be repaired, JinHai will directly send the customer a good product to replace the defective one;
If the product is repairable, JinHai will negotiate with the customer and coordinate with a third party approved by the customer to assist with the repair, and the cost will be borne by JinHai;
Under normal order conditions, JinHai will give customers products at a rate of 0.1% of the order amount for later product maintenance or replacement.
Quality begins with details, and service builds trust. The Jinhai after-sales team is dedicated to resolving your issue!
线束是由多根电线/电缆、连接器、端子、保护套管等组件，通过捆扎、包裹等方式组成的集成化电气连接系统。与普通电缆相比：
A.集成度：线束是多线路系统化集成，电缆是单根导体
B.功能：线束实现多点互联和信号分配，电缆仅传输电能/信号
C.定制性：线束需根据应用场景定制设计，电缆多为标准件
D.防护：线束具有整体防护结构（波纹管、胶带等），电缆多为单一绝缘层
一条标准线束包含：
A.导体：多股铜线（常规信号传输应用）或单芯线（高频信号传输应用）
B.绝缘层：PVC/XLPE/硅胶等材质
C.连接器：AMP/TE等品牌，含端子、外壳
D.保护材料：波纹管、胶带、编织网等
E.固定件：扎带、支架、卡扣等
F.标识：色标、标签、条码等
A. 温度等级：
PVC：-40℃~105℃（低压系统）
交联聚乙烯(XLPE)：125℃（发动机舱）
硅胶：-60℃~200℃（新能源高压）
B.机械性能：
耐磨：TPE/TPU优于PVC
柔韧性：硅胶最优
C.环保要求：符合ROHS/REACH
成本：PVC＜XLPE＜硅胶
诊断流程：
A.测量回路电阻（标准值＜0.5Ω，使用高精度毫欧表，分辨率：0.1mΩ）
B.进行振动测试（20-2000Hz扫频，红外热像仪）
C.使用微欧计检测接触电阻
重点检查：
A.端子压接区（截面分析）
B.连接器锁止机构
C.线束弯曲半径过小处
A.采用”蛇形布线”（预留10%长度余量）
B.固定点间距≤200mm
C.使用PA66材质支架（耐温120℃)
D.导线：0.3mm²细绞线（比常规线柔韧性提升25%）
E.绝缘层：TPE-S（动态弯曲寿命＞50万次）
F.端子压接：实施剖面分析
G.点胶固定：汉高乐泰3265结构胶（剪切强度＞15MPa）
If you need to custom wiring harness for your product, JinHai is your first choice. Send us your detailed requirement and get an instant quote now.
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