Painless Wiring 28 Circuit Classic-Plus Customizable Chassis Harness

The Painless Performance 28 Circuit Classic-Plus Customizable Chassis Harness is the brand's most widely used universal wiring solution for custom and classic vehicle builds. Engineered to deliver comprehensive electrical coverage across 28 circuits, this harness line is purpose-built for hot rods, street rods, muscle cars, resto-mods, and virtually any custom application where a clean, reliable electrical foundation is required.

Multiple configurations are available across this product line to match a wide range of ignition styles, mounting preferences, and chassis layouts — ensuring the right fit for nearly any build. Whether you're wiring a traditional street rod, a long-bed pickup, or a trunk-mounted fuse block application, there is a Classic-Plus variant engineered to meet your specific requirements.

Key Features:

• 28 circuits with 18 fuses, a horn relay, and a maxi fuse for thorough power and accessory distribution
• GM-engineered fuse block with dedicated Painless mounting bracket included
• GM color-coded wires with circuit identification printed directly on each wire for fast, error-free installation
• Prewired plugs for headlights and dimmer switch eliminate custom splicing at the most common connection points
• GM turn signal switch connectors included across the product line
• Blade and maxi fuse protection for both standard and high-current circuits
• Universal harness lengths adaptable to a wide range of chassis configurations
• Compatible with carbureted and stand-alone fuel injection setups
• Comprehensive installation instructions and wiring diagrams included

Built to a Higher Engineering Standard

Painless Performance harnesses are designed by professional engineers using the latest diagnostic equipment and AutoCAD to ensure consistency in manufacturing and a straightforward installation experience. Every harness in the lineup is backed by Painless Performance's core guarantee — when it's installed correctly, it works. This commitment to engineering integrity, quality components, and installer-friendly design has made Painless the trusted choice for professional builders and serious enthusiasts tackling custom electrical systems.