Wiring Harnesses by Painless. Details:This Painless Performance 21-circuit chassis harness is our most widely used customizable automotive wiring harness. This universal kit is great for hot rod or street rod builds, but you'll find that it's easily adaptable to almost any vehicle and has enough length to handle full size and muscle cars. This harness comes with open ended ignition switch wires that can easily be adapted to any ignition switch out there. For those using a GM Keyed Column, Painless part number 10101 comes with a Pre-Terminated GM ignition switch connector. Included with this harness are the following parts: GM engineered fuse block & Painless mounting bracket, GM turn signal connectors, pre wired plugs for the headlights & dimmer switch. Each wire is printed with the circuit identification as well as using GM color codes for easy installation. Wire your classic car once and wire it right with a Painless Customizable wiring harness.