• Universal design for nearly any 12-volt vehicle and engine & transmission combinations
• 22 individually fused circuits, conveniently bundled into 11 "pause and go" sections
• Constructed of GXL polyethylene insulated automotive-grade copper wiring
• Each wire strand is color-coded and labeled every six inches for easy identification
• Plug-and-play with factory or aftermarket 1967-1996 GM tilt steering columns
• Compact 5.5" x 4.5" x 3.3" fuse block mounts under dash (firewall or cowl side)
• Appropriate wire diameter and fuse rating for each circuit’s load
• Uses easy to find modern blade-style ATO/ATC spec standard blade fuses
• Taillight leads are 17 feet in length and work with most vehicles including trucks
• Harness kit includes headlight switch, dimmer switch, horn relay, and accessory wiring
• Complete Speedway wiring harness kit weighs less than 8 lbs. installed

Wire Your Hot Rod, Truck, or Muscle Car Like a Pro with Our 22 Circuit Wiring Harness

Classic muscle cars and hot rods are often sidelined with electrical issues mainly due to decades old crumbling wiring that has been patched and cut and spliced together over the years. Flickering lights, hard starting, inaccurate, or inoperable dash gauges and more are problems that can often be solved with an overhaul of the vehicle’s wiring system. Ditching that spaghetti under your dashboard and that ancient Bakelite fuse box that uses glass fuses is the fastest way to make your classic a reliable, and fun, ride you’ll want to take out every weekend instead of dreading those wiring issues every time you twist the key.

The Gearhead 22 circuit wiring harness is a great solution for classic vehicles, kit cars, replicas, and race cars that need extra accessory wiring circuits over and above the basics like ignition, lighting, horn, wipers, gauges, and AC/heat. Whether you're building an option-laden car with power windows, power locks, cruise control and more, or just want to have extra circuits available in your fuse box for future updates, this 22-circuit wiring kit has the circuit capability you are looking for. Perfect for hot rods, muscle cars, classic trucks, and other applications where you’re planning on running modern power accessories usually found on restomod or pro touring type of builds, the harness easily handles your lights, ignition, and other necessities to be road legal while providing plenty of expansion. Any unused circuits can be bundled up and tucked away under the dash for future use. The compact fuse block uses standard ATO/ATC spec Blade Fuse Assortment you can find at any auto parts store) can mount just about anywhere under the dash or on the firewall.

Plug-and-Play with GM Tilt Columns, Including Factory and Aftermarket Versions

Wiring up the steering column controls can be a daunting task, but our harness makes it easy. This harness plugs directly into most GM-style Shop GM Style Tilt Columns. It connects to aftermarket tilt columns from ididit, Flaming River, or Gearhead as well as factory GM tilt columns from 1968-1996 cars, trucks and vans (see our full list of GM Tilt Column Compatibility Chart. If you're sourcing a column from the junkyard, look for one with a flat "ribbon" plug, either 3-7/8-inch or 4-1/4-inch long (with 10 or more wires). Ignition switch plugs to connect "keyed" GM columns are also included in this kit.

Not using a GM tilt column? No problem. This harness easily splices into other steering columns with the included pin-out wiring diagram (it helps to have a wiring schematic for your vehicle here, too). We include the proper wiring connectors for the GM column mounted ignition switch, but these can be used for a Shop Ignition Switches using the included wiring diagrams. Headlight connectors, headlight switch, high beam dimmer switch, horn relay, accessory wiring leads, and other connectors are included as well to ensure your installation is completed without drama.

Modern High-Quality Automotive Grade Insulated Wire Labeled Every Six Inches

Patches and splicing are tedious and unreliable. Your car deserves better! Start fresh with modern polyethylene-insulated, stranded bare copper wire. Each harness is constructed from premium quality GXL automotive wiring, with the appropriate wire diameter for each fused circuit (ranging 8 to 16 gauge). Every strand of this wire harness is covered with a high-temperature (-40°F to +257°F) outer coating, color coded using standard GM wire circuit colors and labeled every six inches with the circuit name to aid in a smooth installation for any DIY enthusiast. We even provide the correct wiring and terminals to connect a traditional GM alternator or the popular “one wire” alternators many opt to use. In other words, you can expect the same quality of automotive wiring used by the big three OE manufacturers.

Modular Design Fuse Block with Modern Fuses for Easy Servicing

A fully labeled fuse block gives easy service, fuse replacement, and endless mounting solutions. The fuse block includes two molded through mounts to use screws, bolts, or studs to mount on your firewall, transmission tunnel, or cowl side panel under the dash. Most importantly, the fuse box uses modern ATO/ATC spec blade fuses and a common two-terminal style flasher for both turn signals and hazard warning lights (both mounts directly in the fuse panel). No more fragile, corroded glass fuses! Crimp connectors, terminals, and more are included to get you started right away. 

Conveniently Bundled Wires Makes Harness Routing and Installation Stress Free

This Gearhead wiring harness works with nearly any 12-volt vehicle, engine, and transmission combination (carb or EFI, automatic or manual), including engine swaps and is the perfect solution for vehicles with no reproduction harness options, custom builds, or the budget-minded DIY builder. The harness consists of 11 branches that are strategically bundled to simplify installation. These pre-sorted wire bundles help the first-time wire harness installer make the installation go smoothly, taking a lot of the guess work out of wire routing. The 17-foot-long taillight leads allow easy connection in most vehicles, including wagons and pickup trucks. The 22-circuit wiring harness includes a 7-page instruction book with color diagrams, covering each of the pre-bundled circuits in detail. Simply route your harness as needed, make your connections and be amazed at just how dependable your ride is now with updated wiring.