Wire Harness Design Consulting

From Prototype Wiring to Production-Ready Harnesses

Critical Source Technologies helps hardware startups transform prototype wiring into production-ready wire harnesses for scalable, reliable manufacturing.

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Our Craft

Engineering Wire Harnesses That Scale

Harness Assembly

Wire bundles engineered and loomed for repeatable, production-grade builds.

Connector & Pinout Design

Precise pin mapping and connector selection built to spec, every time.

Engineering Documentation

Routing diagrams and drawing packages manufacturers can quote and build from.

What We Do

Consulting From Concept to Scale

We help hardware startups take prototype wiring and turn it into a harness designed to be built at volume.

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Design for Manufacturability

We review your prototype wiring and re-engineer it for repeatable, cost-effective production before you commit to tooling.

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Harness Engineering & Documentation

Production-grade drawings, wire lists, and BOMs built to IPC/WHMA-A-620 standards that manufacturers can quote and build from.

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Prototype-to-Production Transition

We bridge the gap between a hand-built proof of concept and a harness that's ready for repeatable, scalable manufacturing.

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Manufacturing Sourcing Partner Support

We help you identify, vet, and qualify harness manufacturers that match your volume, quality, and budget requirements.

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Cost & Scalability Optimization

We identify design changes that reduce unit cost and assembly time as your production volume grows.

Quality & Compliance Support

Guidance on testing, inspection criteria, and industry standards so your harnesses are reliable from the first build.

Why Choose Us

Built for Hardware Startups

We combine engineering precision with a startup-first approach on every engagement.

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Startup-Focused Expertise

We speak the language of early-stage hardware teams and understand the constraints of moving fast on a limited budget.

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Bridge Prototype to Scale

We specialize in the exact transition point most startups struggle with: going from one-off wiring to a repeatable harness.

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Engineering Precision

Every design undergoes rigorous internal checks before delivery to ensure zero defects at handoff to manufacturing.

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Dedicated Partnership

We become an extension of your engineering team — available on-site or remote through every phase of the transition.

Our Mission

Helping hardware startups transform prototype wiring into production-ready wire harnesses for scalable, reliable manufacturing.

Get in Touch

Start Your Project Today

Have a prototype that needs to become production-ready? Reach out and one of our engineers will get back to you promptly.

Contact Information

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Phone 408-800-1381
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Location Sacramento, CA, USA
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Business Hours Monday – Friday, 08:00 – 17:00