Semi-finished 21-circuit universal wiring harness, ideal for complete rewiring with a clear, organised and scalable base.

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Perfect for ambitious projects requiring more functions and relays.

This 21-circuit wiring harness is designed for demanding projects: complete restoration, prototype, racing car, 4×4, agricultural or industrial machinery.

It offers greater capacity than the 14-circuit versions, allowing more equipment and accessories to be added without overloading the system.

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🏷️ Integrated professional marking

Each wire is engraved with its function every 15 cm, guaranteeing :

• Immediate identification
• Error-free wiring
• Simplified maintenance

Each circuit corresponds directly to its fuse marked on the box.

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🔌 Fuse box 21 circuits + 3 relays

• 21 fuse locations
• 3 relays included
• Protective cover
• Clear, centralised organisation

➡️ Provides clean power to the engine, passenger compartment and additional accessories.

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⚡ Adapted cable cross-sections

• Power outputs: 3 mm².
• Control/information outputs: 1.5 mm².
• Wire length: 1.5 m

➡️ Ideal for complete chassis with room to manoeuvre.

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🧵 Professional finish recommended

For a result worthy of a competition beam :

• 🧶 Black stretch braided sheath (protection & aesthetics)
• 🩹 Black fabric tape for OEM finishing
• 🔌 Deutsch or AMP connectors for watertight, durable connections.

These elements create a :

• Robust
• Clean
• Easy to maintain
• Vibration-resistant

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⚙️ Technical specifications

• Type: semi-finished universal wiring harness
• Fuse box: 21 pre-wired circuits
• Relays: 3 included
• Wire marking: engraving every 15 cm
• Power cross-section: 3 mm².
• Control section: 1.5 mm².
• Wire length: 1.5 m
• Applications: complete chassis

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🧰 Applications

• Complete restoration
• Prototype car
• Racing car
• 4×4 / off-road
• Tractors & agricultural machinery
• Industrial plants

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🔧 Discount Autosport advice

• Plan the routing before fitting
• Adapt fuse calibration
• Protect hot areas
• Use pro waterproof connectors
• Test each circuit individually

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✅ Product benefits

✅ 21 circuits for complete projects
✅ 3 relays included
✅ Ultra clear engraved marking
✅ Centralised organisation
✅ Matching power/control sections
✅ Car & agricultural compatible
✅ Ideal for competition & catering
✅ Scalable and professional base