Cost pressure in wire harness manufacturing is constant, but cutting corners on quality leads to field failures, warranty claims, and damaged reputation—outcomes far more expensive than the savings they produce. The real opportunity lies in systematic cost reduction through smarter design, strategic material choices, production efficiency, and partnering with the right manufacturer. This article outlines proven strategies to reduce harness costs while maintaining or even improving quality.
Optimize the Design
The most impactful cost reductions happen at the design stage—before a single wire is cut. Once a harness design is released to production, changing it becomes expensive and disruptive.
Consolidate wire gauges. If your harness uses eight different wire gauges, evaluate whether some can be consolidated. Using AWG 18 where AWG 20 would suffice adds a small material cost per harness, but eliminating a gauge from the bill of materials reduces setup time, changeover time, inventory complexity, and the risk of production errors. The net effect is often a cost reduction.
Standardize connectors. Every unique connector in a harness adds a line item to inventory, a potential minimum order quantity issue, and a setup operation in production. Where possible, standardize on a smaller set of connector families that cover your range of circuit counts and current requirements.
Minimize branch complexity. Every branch point in a harness requires additional labor for breakout forming, taping or braiding, and dimensional verification. Simplifying the routing—even if it means slightly longer wire runs—can reduce assembly time significantly. Our wire harness design guide covers best practices for designing manufacturable harnesses from the start.
Design for automated processing. Harnesses designed with automated wire cutting, stripping, and crimping in mind cost less to produce than those requiring extensive manual operations. This means using standard strip lengths, avoiding unusual crimp configurations, and selecting terminals compatible with automatic applicators.
Select Materials Strategically
Match insulation to actual requirements. Specifying PTFE insulation where PVC would meet the thermal and chemical requirements increases wire cost by 5–10 times. Carefully evaluate the actual operating environment and select the most cost-effective insulation that satisfies all requirements with appropriate safety margin—but no more.
Evaluate copper alternatives where appropriate. Copper-clad aluminum (CCA) conductors cost less than solid copper and weigh less, making them suitable for some stationary applications where the slight increase in resistance is acceptable. However, CCA is not appropriate for all applications—particularly those involving crimped terminations designed for solid copper.
Avoid over-specifying connectors. Mil-spec connectors provide exceptional performance, but they cost 10 to 50 times more than commercial equivalents. Use military-grade components only where the application genuinely demands them. For many industrial and commercial applications, quality commercial connectors from reputable manufacturers provide excellent reliability at a fraction of the cost.
Prefer single-core wire over multi-core where possible. Single-core (solid or single-stranded) wires are significantly more automation-friendly than multi-core cables. Automatic cutting, stripping, and crimping machines process single-core wires faster and more reliably, reducing cycle time and labor cost per termination. Multi-core cables require additional steps—jacket stripping, core separation, individual core identification, and often manual handling—that add time and cost at every stage. Where your design allows individual wire runs rather than bundled multi-core cables, choosing single-core construction can cut processing costs by 20–40 percent while also improving traceability and simplifying testing. Reserve multi-core cables for applications where they are genuinely necessary, such as long external runs requiring a common jacket for mechanical protection or EMC shielding. For more on wire selection, see our wire harness glossary.
Improve Production Efficiency
Invest in proper tooling. Custom jig boards, assembly fixtures, and test fixtures have an upfront cost but dramatically reduce per-unit labor time and improve consistency. A well-designed assembly board with clearly marked routing paths, connector holders, and dimensional references can cut assembly time by 30–50 percent compared to free-form assembly.
Batch similar operations. Cutting and stripping all wires of the same gauge and length in a single batch, then crimping all terminals of the same type in sequence, minimizes machine changeovers and maximizes operator efficiency. This requires production planning discipline but yields measurable labor savings.
Implement lean manufacturing principles. Organized workstations, visual management, kanban-controlled material flow, and standardized work instructions reduce waste, minimize errors, and improve throughput without capital investment. For common questions about production processes and lead times, see our FAQ page.
Invest in Testing to Avoid Failure Costs
Testing is not a cost to minimize—it is an investment that prevents far greater expenses downstream. A single defective harness that reaches a customer’s assembly line can cause line stoppages costing thousands of euros per hour. A field failure can trigger product recalls costing millions.
Automated electrical testing catches defects at the lowest possible cost—typically a few cents per harness for the test cycle itself. Pull-force testing and crimp cross-section analysis validate process capability and prevent systematic defects from reaching customers. The cost of testing equipment and fixtures is recovered many times over by preventing a single significant quality escape.
Work with the Right Manufacturing Partner
The manufacturer you choose has an enormous impact on total cost. The lowest piece-price quote is not always the lowest total cost. Consider:
- Engineering support: A manufacturer that reviews your design and suggests cost-saving alternatives before production starts provides value that more than offsets a slightly higher piece price.
- Quality systems: Robust quality management reduces scrap, rework, and customer complaints—all of which have real costs.
- Supply chain management: A manufacturer with strong supplier relationships and volume purchasing power can secure better material pricing than a smaller operation.
- Flexibility and responsiveness: The ability to handle engineering changes, volume fluctuations, and urgent orders without excessive premium charges keeps your total cost predictable.
Explore the full range of capabilities SIMKAB offers on our services page. We work as an extension of your engineering team to optimize designs for cost and manufacturability from day one.
Start Reducing Costs Today
The most effective cost reduction strategy combines all of these approaches: design optimization, smart material selection, efficient production, rigorous testing, and a capable manufacturing partner. At SIMKAB, we help customers achieve meaningful cost savings on every project while maintaining the quality standards their applications demand. Request a quote to see how we can reduce your wire harness costs without compromising reliability.
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