Aircraft Wiring Solutions
Built for Safety. Designed for Simplicity.
Custom Circuitry builds reliable, installation-ready harnesses for homebuilt and experimental aircraft using certified workmanship and proven aerospace practices. Whether you’re wiring a basic VFR panel or integrating a full glass cockpit, we deliver tested, documented harnesses that simplify your build and keep you flying safely.
Featured Products
EFIS Panel Harness Package
From $895
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Pre-wired and labeled harnesses for Dynon, Garmin G3X, AFS, MGL, and GRT systems
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Supports power, CAN, serial, RS-232, and audio routing to transponders, GPS, and audio panels
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Printed diagrams, labeled connectors, and tested continuity
12V Master Bus Kit
From $495
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Pre-assembled power system with master relay, starter solenoid, and labeled Tefzel® wiring
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Includes fuse block, battery feeds, and starter/alternator wiring
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Based on Z-11/Z-13 or dual bus configurations
Wingtip Lighting Harness Kit
From $325
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Labeled looms for nav, strobe, and landing lights
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Heat-shrink labeled Tefzel® wire with sealed connectors
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Simplifies routing through wings or conduits
Why Builders Choose Us:
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Precision-built for airframe routing
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No guesswork: every circuit labeled and documented
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Designed for real-world vibration, heat, and inspection readiness
We also offer pre-labeled airframe looms and modular routing kits for wings, tails, and engine compartments. These can be bundled in phases, or built as a one-shot system depending on your build plan.
🛠️ Built by a Technician with Real Flight Hardware Experience
These are not repackaged car harnesses. Your builder is IPC/WHMA-A-620 and J-STD-001 certified with Space Addendums — the same certifications required for NASA, DoD, and aerospace flight programs.
Real-world experience includes:
- Over 350 satellites built for Airbus-OneWeb
- Flight harness fabrication for SpaceX Falcon 9 & Crew Dragon
- Deep integration work on Blue Origin’s New Glenn and Blue Moon spacecraft
That same level of detail, testing, and documentation now supports your experimental aircraft.
📋 What’s Included in Every Harness Package
| Feature | Details |
| Custom wire lengths | Tailored to your panel layout, tray position, and avionics spacing |
| Labeled wires | Every wire labeled with heat shrink or printed ID tags |
| All connectors installed | D-sub, CPC, Molex, MIL-spec, or manufacturer-specific as needed |
| Tested before shipment | Continuity check, pin-to-pin verification, and power-in testing available |
Aircraft Wiring – Why It Matters
Most experimental aircraft wiring failures happen after the first successful flight.
Why? Because homebuilt harnesses often rely on inconsistent crimps, low-grade wire, or “good enough” documentation that leaves you guessing in a crisis. That’s not just annoying — it’s dangerous.
At Custom Circuitry, every aircraft harness is built using Tefzel® MIL-spec wire, fully documented, and tested to aerospace standards. You won’t wonder what wire goes where. You won’t hope it holds up to vibration, heat, or an in-flight restart.
You’ll know it was built right — because it was built like it was going to space.