JY PERFORMANCE Universal 21-Circuit Wiring Harness Kit — 17 Blade Fuses, Labeled Color-Coded Loom for Classic Cars & Swaps

JY PERFORMANCE's Universal 21-Circuit Wiring Harness Kit with 17 fuses is a complete, labeled wiring solution engineered to replace or build automotive electrical systems for classic cars, hotrods, and swaps.

This universal harness consolidates 21 circuits into a single organized loom and includes 17 blade fuses, clearly marked wires and pre-terminated connectors to speed installation and reduce troubleshooting. Designed for compatibility across a wide range of American makes and custom projects, the harness uses high-conductivity copper-core conductors and corrosion-resistant materials to deliver dependable connections in restoration, custom build, and repair work.

What circuits are included and how will they cover my vehicle's needs?

The kit covers the most common automotive circuits required for a complete streetable vehicle or show car. It includes lighting, ignition, accessories, and convenience circuits so you can wire everything from headlights to power windows without sourcing separate looms.

• 21 circuit coverage: horn, fan, dome, hazard, radio, cigarette lighter, door locks, brake, headlights
• Also includes: trunk light, gauges, backup lights, cruise control, wipers, choke, coil, A/C, electric fuel pump, power windows, turn signals
• 17 blade fuses protect grouped circuits and simplify troubleshooting

How does the harness simplify installation and maintenance?

Each wire is color-coded and labeled at regular intervals for quick identification during routing and connections. Pre-labeled leads reduce guesswork, and the included fuse block centralizes circuit protection so you can replace fuses or trace faults without tracing individual wires through the vehicle.

• Labels every 5 inches for clear identification along the loom
• Color-coded insulation matches common wiring standards for easier mapping
• Central 17-fuse block for consolidated circuit protection and quick service access

Will this harness fit my car or custom project?

It’s sold as a universal kit intended for many GM, Ford, Chrysler and other domestic models as well as custom builds, hotrods and rat rods. While the harness covers general circuits, some vehicles require minor routing adjustments, custom pigtails, or professional tuning to integrate with OEM components or advanced modules.

• Universal fit for GM, GMC, Chevy, Chrysler, Mopar, Ford, Mercury, Oldsmobile, Plymouth, Dodge, and more
• Commonly used for restorations, engine swaps, and custom chassis wiring
• Professional or experienced DIY installation recommended for complex factory options

What materials and quality features should I expect?

The harness uses copper-core wire for reliable conductivity and ductility, plus corrosion-resistant terminations to withstand automotive environments. The design focuses on durability and serviceability while keeping installation straightforward for experienced technicians or well-equipped hobbyists.

• High-quality copper core conductors for consistent electrical performance
• Durable insulation and corrosion-resistant connectors for longer life
• Pre-terminated ends where practical to reduce on-vehicle crimping and soldering

Who is this for: The JY PERFORMANCE Universal 21-Circuit Wiring Harness Kit with 17 fuses is aimed at classic-car restorers, hotrod builders, custom-fabrication shops, and skilled DIYers who need a complete, labeled wiring solution. If you are replacing an old, brittle loom, wiring a chassis from scratch, or performing an engine swap where factory wiring won't adapt, this kit provides an organized starting point — however, consult an experienced installer if your vehicle has complex factory electronics or advanced safety systems.