Auto Parts Prodigy 21-Circuit Universal Wiring Harness Kit - GM Color-Coded GXL125 Wires for Classic Cars

Auto Parts Prodigy 21-circuit universal wiring harness kit supplies a complete, GM color-coded wiring solution for hot rods, rat rods and classic restorations.

Whether you're rebuilding a Chevy, Mopar, Ford or custom chassis, this full-featured wiring kit brings labeled, extra-long GXL 125 wires and detailed installation pages to simplify electrical work. It covers common circuits found on classic and custom vehicles, uses high-temperature cross-linked polyethylene insulation for durability, and includes connectors and documentation tailored to GM, Ford and Mopar layouts. Professional installation is recommended for complex systems, but hobbyists will appreciate the organized color coding and comprehensive circuit coverage.

Which circuits are included and will it handle my car's accessories?

This harness covers 21 essential circuits so you can wire most factory-style accessories and common aftermarket components. It includes power, lighting, ignition and convenience circuits used in many classic builds.

• Horn, headlights, turn signals, brake and backup lights
• Gauges, radio, dome light, trunk light and cigarette lighter
• Wipers, fan, choke, coil and cruise control connections
• Power windows, electric fuel pump, door locks and hazard lights

How does the GM color coding help during installation?

Wires are coded to GM color standards, making it faster to match circuits and trace wiring paths during routing and troubleshooting. Clear color conventions reduce guesswork and speed up both initial installs and later repairs.

• Color-coded insulation for each circuit simplifies identification
• Reduces time spent tracing wires behind dash or in the engine bay
• Compatible wiring diagrams for GM, Ford and Mopar provided

What are the build quality and materials—are these wires durable?

The harness uses GXL 125 wire with cross-linked polyethylene jacketing designed to withstand heat and exposure to automotive fluids. The construction is intended for long-term use in classic cars and custom builds, offering better resistance than basic PVC-insulated wires.

• GXL 125 high-temp wire resists grease, oil, gas and acids
• Extra-long leads accommodate varied chassis and custom routing
• Multiple connector types included for common terminals and components

Will this kit fit my specific make—what support is included?

The kit is universal and includes specific instruction pages for GM, Ford and Mopar to guide placement and connections. While it suits many classic cars and hot rod builds, modifications or professional help might be needed for non-standard equipment or modern ECU integrations.

• Detailed instructions with GM, Ford and Mopar-specific pages
• Universal layout adaptable to various chassis and body styles
• Recommended professional install for advanced or electronic systems

Who is this for: Auto Parts Prodigy’s 21-circuit universal wiring harness is aimed at classic car enthusiasts, hot rod builders and restoration shops that want a near-complete, color-coded wiring solution. It suits hobbyists comfortable with basic wiring and professionals who need a durable, organized harness with extra length and manufacturer-style color coding to speed installation and reduce wiring errors.