--- product_id: 15819745 title: "Painless Performance 20120 Direct Fit Mustang Chassis Harness (1965-1966) - 22 Circuits" brand: "painless wiring" price: "€ 1949.98" currency: EUR in_stock: true category: "Painless" url: https://www.desertcart.gr/products/15819745-painless-performance-20120-direct-fit-mustang-chassis-harness-1965-1966 store_origin: GR region: Greece --- # 6 gauge charge wire & midi fuse Full color installation manual 22 circuits direct fit Painless Performance 20120 Direct Fit Mustang Chassis Harness (1965-1966) - 22 Circuits **Brand:** painless wiring **Price:** € 1949.98 **Availability:** ✅ In Stock ## Summary > ⚡ Wire your Mustang like a pro — effortless power, legendary reliability! ## Quick Answers - **What is this?** Painless Performance 20120 Direct Fit Mustang Chassis Harness (1965-1966) - 22 Circuits by painless wiring - **How much does it cost?** € 1949.98 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/15819745-painless-performance-20120-direct-fit-mustang-chassis-harness-1965-1966) ## Best For - painless wiring enthusiasts ## Why This Product - Trusted painless wiring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Premium TXL Wire:** High strand count copper with abrasion-resistant insulation ensures durability and professional-grade performance. - • **Auxiliary Power Ready:** Includes a 20-amp relay circuit for seamless integration of accessories like fog lights or electric fuel pumps. - • **Modern Safety Upgrade:** Upgraded ATO bladed fuses and midi fuse replace outdated glass fuses and fusible links for reliable high-amp protection. - • **Plug & Play Precision:** Pre-terminated connectors and Ford color-coded wires make installation effortless and error-free. - • **American Made Excellence:** Proudly crafted in Fort Worth, TX with expert technical support just a call away for stress-free installation. ## Overview The Painless Performance 20120 Direct Fit Mustang Chassis Harness is a 22-circuit wiring solution designed specifically for 1965-1966 Mustangs. Featuring factory-style connectors, Ford color-coded printed wiring, and a full-color installation manual, it simplifies complex wiring tasks. Upgraded with modern ATO bladed fuses, a 6 gauge charge wire, and a midi fuse, it supports today’s high-amp alternators while enhancing safety and reliability. Built with premium TXL wire and proudly made in the USA, this harness delivers professional-grade durability and ease of installation backed by expert technical support. ## Description This 22-circuit direct fit 1965-1966 Ford Mustang wiring harness has many of the factory connectors already installed on the harness out of the box. This harness uses our unique covered micro-fuse block. Also featured is an auxiliary circuit with 20-amp relay for accessories such as fog lights, or an electric fuel pump. Each wire is custom printed with the circuit identification as well as using Ford wiring color codes for easy installation. ## Features - Printed Wiring and Full Color Installation Manual: Every wire is printed with the circuit identification and uses Ford color codes for easy installation; Paired with the highly detailed full color installation manual, Painless makes a tedious task simple - Upgraded ATO bladed fuses: Leave antiquated glass fuses in the past where they belong and update to modern bladed fuses; 6 gauge charge wire and midi fuse (no more problematic fusible link! ) will keep up with today’s high amp alternators - Most of the work is done, with Painless direct fit wiring, nearly every connector is already terminated and installed, making for a simple installation - When reliability and performance can't be compromised, you want TXL Wire - not the inexpensive primary wire you find in other harnesses; High strand count copper and high-quality insulation makes for high abrasion resistance and easy routing - American Made, American Proud Since 1990: Every Painless harness is proudly produced in Fort Worth, TX, where we also staff our unmatched Technical Support department. ; Need help during install…simply give us a call ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0006HJP0I | | Best Sellers Rank | #582,860 in Automotive ( See Top 100 in Automotive ) #3,071 in Automotive Replacement Electrical Wiring Harnesses | | Brand | Painless Wiring | | Customer Reviews | 4.3 4.3 out of 5 stars (19) | | Date First Available | April 5, 2007 | | Exterior | Painted | | Is Discontinued By Manufacturer | No | | Item Weight | 7.54 pounds | | Item model number | 20120 | | Manufacturer | Painless Performance Products, LLC | | Manufacturer Part Number | 20120 | | Model | 20120 | | Product Dimensions | 14.5 x 10.25 x 5.25 inches | ## Images ![Painless Performance 20120 Direct Fit Mustang Chassis Harness (1965-1966) - 22 Circuits - Image 1](https://m.media-amazon.com/images/I/81WVw0hpkVL.jpg) ## Frequently Bought Together - Painless Performance 20120 Direct Fit Mustang Chassis Harness (1965-1966) - 22 Circuits - Painless Performance 70901 PowerBraid Split Braided Sleeving, 1/4" Diameter, 20' Length, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/15819745-painless-performance-20120-direct-fit-mustang-chassis-harness-1965-1966](https://www.desertcart.gr/products/15819745-painless-performance-20120-direct-fit-mustang-chassis-harness-1965-1966) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-18*