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](https://jinhaitrd.com/wp-content/uploads/2025/08/RV7WROJ-096-8ft-7-Wire-Trailer-Wiring-Harness.png.webp)
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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Our purchasing department uses a global strategy to source quality components from special channels.
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!
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.
Room 1626, 4th Floor, Building 13, Xiuyuan, Dachengli, Fengtai District, Beijing, China
