Process for Custom Wire Harness Manufacturing

The process for custom wire harness manufacturing includes seven steps: understanding design specifications, selecting materials, cutting and stripping wires, crimping and soldering, assembly and routing, testing for quality, and packaging for delivery. Each stage ensures durability, safety, and optimal performance in the intended application.
Automotive Wire Harness

1. Design and Specification​

The manufacturing process begins with understanding the specific requirements of the customer. Engineers work closely with the client to define the type of wires, connectors, terminals, and protective sheathing that will be needed for the application. Key considerations include

Electrical requirements

Environmental factors

Physical constraints

2. Material Selection

Choosing the right materials is crucial for ensuring durability, flexibility, and safety. Some of the most common materials used in wire harness manufacturing include:

Wires & cables

vailable in various gauges, materials (such as copper or aluminum), and insulation types.

Connectors & terminals

Ensure proper mating of wires to components.

Wires & cables

Wire shielding, made from heat-shrink tubing, nylon, or PVC, protects against moisture, heat, and abrasion.
Material selection is guided by the specific electrical and environmental needs of the project, ensuring the harness can withstand the demands of its operating environment.

3. Wire Cutting and Stripping

The next step involves attaching terminals or connectors to the stripped wire ends. Crimping is the process of mechanically compressing a connector onto the wire, ensuring a solid electrical connection. Automated crimping machines are often used for consistency and speed.

In some cases, soldering is also used to ensure a strong bond between the wire and the connector. This step requires a high degree of precision, as improper soldering can lead to weak connections, which can compromise the performance of the wire harness.

4. Crimping and Soldering

The next step involves attaching terminals or connectors to the stripped wire ends. Crimping is the process of mechanically compressing a connector onto the wire, ensuring a solid electrical connection. Automated crimping machines are often used for consistency and speed.

In some cases, soldering is also used to ensure a strong bond between the wire and the connector. This step requires a high degree of precision, as improper soldering can lead to weak connections, which can compromise the performance of the wire harness.

5. Assembly and Routing

Once the individual wires are cut, stripped, and terminated, they are gathered together and assembled into the harness. The wires are routed according to the design specifications, and cable ties, tape, or clamps are used to keep the wires organized.

During this stage, the harness is also fitted with protective sheathing or coverings to shield the wires from environmental elements such as heat, moisture, or abrasion. This step is critical for ensuring the longevity of the harness in its intended operating environment.

6. Testing and Quality Control

Quality control is a key aspect of the wire harness manufacturing process. Each harness undergoes rigorous testing to ensure that it meets both electrical and mechanical performance standards. Common tests include:

testing quality control

7. Packaging and Delivery

Once the individual wires are cut, stripped, and terminated, they are gathered together and assembled into the harness. The wires are routed according to the design specifications, and cable ties, tape, or clamps are used to keep the wires organized.

Once the wire harnesses pass all quality checks, they are carefully packaged to prevent damage during transport. Depending on the application, special packaging methods might be used to prevent contamination or ensure the product’s safety during delivery.

Manufacturers often provide detailed labeling and instructions with each harness, allowing easy installation and integration into the customer’s system.

Hommer Zhao

Hommer Zhao, Director of Cloom Tech, brings extensive expertise in the custom wire harness and cable assembly industry.

Hommer actively engages with leading publications and organizations in the field. He regularly consults resources such as Wiring Harness News publication offering insights into wire harness manufacturing and assembly techniques.

Additionally, Hommer contributes to the Wiring Harness Manufacturer’s Association (WHMA), which provides valuable resources and best practices for professionals in the wire harness industry.

Hommer Zhao also attends the annual Electrical Wire Processing Technology Expo where Cloom Tech has a booth.