Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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America's Oldest Speed Shop ®

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Shop Body At Speedway Motors

When it comes to your cars body, Speedway Motors has you covered - literally. We stock the safest roll cages available along with the replacement body panels, bumpers, and nose pieces for the dirt racer. We haven't forgotten our Street Rodders either! We stock hard to find fiberglass bodies and fenders for your street rod as well as the seats, gauges, and mirrors to round out your interior.

"Frame, Chassis Wire Harnesses" Page 1 of 1

  • Painless Wiring 20120 1964-1966 Mustang 22 Circuit Wiring Harness
    Painless Wiring 20120 1964-1966 Mustang 22 Circuit Wiring Harness
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    One thing to never forget - the wiring in your muscle car is forty years old and updating to modern and safe components is easy. Owners and restorers of 1964 to 1966 first generation Mustangs can take comfort in the fact that there is now an electrical system upgrade from Painless to completely rewire this classic car. These Painless wiring harnesses feature many pre-wired connections and are color coded to make installation a snap.

    This 22 circuit direct fit 1965-1966 Mustang 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 color codes for easy installation.  NOTE: THIS WILL NOT FIT 1964 1/2 MUSTANGS

    1964-1966 Mustang Wiring Instructions (PDF)

    Note: Some firewall modifications required.

  • Painless 10123 1966-1976 Ford Muscle Car 21 Circuit Wiring Harness
    Painless 10123 1966-1976 Ford Muscle Car 21 Circuit Wiring Harness
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    One thing to never forget - the wiring in your muscle car is forty years old and updating to modern and safe components is easy. These Painless wiring harnesses feature many pre-wired connections and are color coded to make installation a snap. This customizable 21 circuit harness can be used in almost any application where you want Ford color coded wires. 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 for easy installation.

    Designed for 1966-1976 Ford muscle cars including Galaxie, LTD, Falcon, Fairlane, Mustang, Maverick, Torino, and Ranchero.

    NOTE: Will not work with Thunderbirds. 

    1966-1976 Ford Muscle Car Wiring Instructions (PDF)

  • Speedway Economy 12 Circuit Wiring Harness
    Speedway Economy 12 Circuit Wiring Harness
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    This harness was designed to offer you all the highest quality components in a package designed for cars with minimum accessories. Each wire is color coded and labeled every few inches.

    Our prewired 12 circuit kit will fit all your basic needs and makes wiring a painless process. It is designed especially for the street rod without accessories. It also includes horn relay and connector, turn and hazard signals, dimmer switch connector, circuit breaker for headlights, two flashers, one alternator plug, two ignition switch connectors, plus more.

    • Mainfuse box base is 1-7/8" x 3-11/16"
    • Box height is 3-3/4"
    12 Circuit Wiring Harness Installation Instructions (PDF)
  • Garage Sale - 2003 Chevy-GMC & Caddy Brake Control Adapter Harnesses
    Garage Sale
    Garage Sale - 2003 Chevy-GMC & Caddy Brake Control Adapter Harnesses
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    Available for 2003 Chevy/GMC & Cadillac models.

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

  • American Autowire 510105 1970-72 Chevelle Wiring Harness
    American Autowire 510105 1970-72 Chevelle Wiring Harness
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                This Classic Update harness from American Autowire directly replaces your cars old system with a modern fuse box and wires. Plus this kit allows you to add a cooling fan, third brake light, power windows, different guages or a better stereo. All your existing switches can be used as this harness has OEM style plugs.
            
  • Painless Wiring 20106 1955-57 Chevy 28 Circuit Wiring Harness
    Painless Wiring 20106 1955-57 Chevy 28 Circuit Wiring Harness
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    This 28 circuit kit is designed to fit the 1955-1957 "Tri-Five Chevy" and includes additional circuits for power options and accessories. This harness features a factory location Painless mounting plate for the fuse block, and special dash & turn signal connectors. Included with this harness you will also find pre wired plugs for the headlights and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation. 

    1955-1957 Chevy Wiring Instructions (PDF)

  • Painless Wiring 20121 1967-1968 Mustang 22 Circuit Wiring Harness
    Painless Wiring 20121 1967-1968 Mustang 22 Circuit Wiring Harness
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    This 22 circuit direct fit 1967-1968 Mustang 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 color codes for easy installation.

    1967-1968 Mustang Wiring Instructions (PDF)

  • Painless Wiring 21 Circuit Wiring Harness
    Painless Wiring 21 Circuit Wiring Harness
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    Easy-to-install 21 Circuit Painless harness features these pre-wired circuits: Coil, emergency flashers, horn, headlights, power windows, wipers, stop lights, gauges, radio (constant hot), air conditioning, heat, electric fan and turn signals. All fuses, flashers and horn relay, pre-installed.

    Choose from the Universal Harness or the GM Harness (Chevy) for use with GM column-mounted ignition switch.

    21 Circuit Wiring Instructions (PDF)

  • Speedway Universal 20 Circuit Wiring Harness
    Speedway Universal 20 Circuit Wiring Harness
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                Whether you're building an option loaded car or just want to have extra circuits available for future updates, this harness is perfect and makes any job painless. Compact 5-1/2"L x 4-1/2"W x 3-1/4"H  fuse block holds 18 standard push-in fuses and can be mounted almost anywhere. 

    Each high temperature wire is color coded and labeled every six inches. Also includes GM type steering column connectors. To keep costs down and the quality high, this harness does not include any switches, light sockets or plugs that you would normally already have.

    • Harness has 20 circuits, of which 18 are fused
    • Taillight leads measure 17' long
    • Includes plug for GM column, headlight switch, dimmer switch, and signal flashers

    Wiring Harness Installation Instructions (PDF)

  • American Autowire 510055 1967-68 Mustang Wiring Harness
    American Autowire 510055 1967-68 Mustang Wiring Harness
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                You should never cut corners when it comes to the electrical system in your muscle car. This Classic Update harness from American Autowire has a modern fuse box, correct headlight switch and connector, updated headlight relays, original style ignition switch connector and circuits for aftermarket gauges, air conditioning, power windows, cooling fan, etc. 
            
  • American Autowire 500434 1957 Chevy Style Wiring Harness
    American Autowire 500434 1957 Chevy Style Wiring Harness
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    If you need a harness that has  modern features, this is the one for you.  This Classic Update wiring harness from American Autowire allows you to plug into the original gauges and dash accessories, headlights, taillights and heater controls.

    Included are connectors for most aftermarket gauges, steering columns, air conditioning, power windows, locks and seats and stereos. Headlight, ignition and dimmer switches included. For use with 1957 Chevy passenger cars, wagons and Nomads only.

     

  • Garage Sale - Ford Brake Control Adapter Harnesses
    Garage Sale
    Garage Sale - Ford Brake Control Adapter Harnesses
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    Available for Ford models.

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

  • Garage Sale - 1999-2002 Chevy-GMC-Cadillac Brake Control Harnesses
    Garage Sale
    Garage Sale - 1999-2002 Chevy-GMC-Cadillac Brake Control Harnesses
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    Available for 1999-2002 Chevy/GMC & Cadillac models.

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

  • Garage Sale - American Autowire 500423 1955-1956 Chevy OEM Style Wiring Harness
    Garage Sale
    Garage Sale - American Autowire 500423 1955-1956 Chevy OEM Style Wiring Harness
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    If you need a harness that has both OEM and modern features, this is the one for you.  This Classic Update wiring harness from American Autowire allows you to plug into the original gauges and dash accessories, headlights, taillights and heater controls.

    Included are connectors for most aftermarket gauges, steering columns, air conditioning, power windows, locks and seats and stereos. Headlight, ignition and dimmer switches included. For use with 1955-1956 Chevy passenger cars, wagons and Nomads only.

    This harness makes use of the stock key and tumbler. If a new key and tumbler are needed, they are available from the manufacturer.

    1955-1956 Chevy OEM Wiring Instructions (PDF) 

     

    This is garage sale priced it is missing the rear body kit.

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 

  • Painless Wiring 20107 1955-1957 Chevy  21 Circuit Wiring Harness
    Painless Wiring 20107 1955-1957 Chevy 21 Circuit Wiring Harness
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    This 21 circuit kit is designed to fit the 1955-1957 "Tri-Five Chevy". This harness features a factory location Painless mounting plate for the fuse block, and special dash & turn signal connectors. Included with this harness you will also find pre wired plugs for the headlights and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation. 

    1955-1957 Chevy Wiring Instructions (PDF)

  • Painless Wiring 10202 Universal 28 Circuit / 18 Fuse Chassis Harness
    Painless Wiring 10202 Universal 28 Circuit / 18 Fuse Chassis Harness
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    This 28 circuit kit includes most all the power accessory circuits you have been looking to add to your vehicle. The versatility of this harness will allow it to be easily adapted to almost any vehicle. This kit comes without the GM column mounted ignition switch connectors. Included with this harness are the following parts; a GM engineered fuse block & Painless mounting bracket; GM turn signal connectors; prewired plugs for the headlights & dimmer switch; and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation. 

    Universal 28 Circuit Wiring Instructions (PDF)

  • Painless Wiring 20122 1969-1970 Mustang 22 Circuit Wiring Harness
    Painless Wiring 20122 1969-1970 Mustang 22 Circuit Wiring Harness
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    This 22 circuit direct fit 1969-1970 Mustang 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 color codes for easy installation.

    1969-1970 Mustang Wiring Instructions (PDF)

  • Painless 20101 1967-1968 Camaro/Firebird 24 Circuit Wiring Harness
    Painless 20101 1967-1968 Camaro/Firebird 24 Circuit Wiring Harness
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    One thing to never forget - the wiring in your muscle car is forty years old and updating to modern and safe components is easy. These Painless Wiring harnesses feature many pre-wired connections and are color coded to make installation a snap. Instructions included.

    This 24 circuit harness is designed for the 1967 and 1968 Camaro & Firebird. It uses a '69 and newer style bulkhead connector design along with blade fuses and enough circuits to wire up just about any installed upgrade to your 1st generation F-body. Some minor bulkhead modification required. Factory original quick connect terminals are included for the in dash printed circuit board.  Pre-terminated plugs for a column mounted ignition switch, dimmer switch, headlights & headlight switch, blower motor, wiper motor, and turn signal switch. Included with this harness you'll also find a detailed manual and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation. 

    1967-1968 Camaro/Firebird Wiring Instructions (PDF)

  • Painless Wiring 10220 28 Circuit Remote Trunk Harness
    Painless Wiring 10220 28 Circuit Remote Trunk Harness
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                Please view the product's page for more information
            
  • Painless Wiring 10130 14 Circuit Remote Mount Microfuse Wiring Harness
    Painless Wiring 10130 14 Circuit Remote Mount Microfuse Wiring Harness
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    This Painless Micro Fuse Harness solves a dilemma faced by many custom car builders: where to mount the fuse block.  With engine compartments becoming more crowded and underdash space at a premium, there often is not room for a standard size fuse block. The new Micro Fuse Harness is the answer.

    The key element is the fuse block itself: it measures just 3" x 3-1/2" x 2" yet holds 12 fuses and 2 relays. You can easily tuck it up under the seat or, because of the unique design of this harness, mount it in the trunk. The fuse block is covered to keep it free from dirt and contaminants.

    Wiring harness is designed with three major groups incorporated into it:

    • Engine/Headlight Group Includes: high beam, low beam, park, right turn, left turn, electric fan, horn, starter solenoid, battery feed, alternator (output/exciter wire), coil, water temperature, oil pressure and air conditioning.
    • Dash Group Includes: wires to connect gauges, indicator lights and switches to their proper sources.
    • Rear Light Group Includes: taillights, dome lights, left and right turn signals, brake lights and fuel sender.

    The kit includes a 10 gauge alternator wire for use with high amperage (over 65 amps) alternators. All wires are color-coded and printed along their entire length for ease of installation. A comprehensive installation manual with charts and diagrams is i

  • Painless Wiring 10201 GM 18 Circuit Wiring Harness
    Painless Wiring 10201 GM 18 Circuit Wiring Harness
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    This 28 circuit kit includes most all the power accessory circuits you have been looking to add to your vehicle. The versatility of this harness will allow it to be easily adapted to almost any vehicle. This kit comes with the GM column mounted ignition switch connectors. Included with this harness are the following parts; a GM engineered fuse block & Painless mounting bracket; GM turn signal connectors; prewired plugs for the headlights & dimmer switch; and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation

    GM Harness for use with late GM columns with column-mounted ignition switch.

    28 Circuit GM Column Wiring Instructions (PDF)

     

  • Painless 20110 1966-1967 Chevy II/Nova 21 Circuit Wiring Harness
    Painless 20110 1966-1967 Chevy II/Nova 21 Circuit Wiring Harness
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    One thing to never forget - the wiring in your muscle car is forty years old and updating to modern and safe components is easy. These Painless Wiring harnesses feature many pre-wired connections and are color coded to make installation a snap. Instructions included.

    This 21 circuit customizable Chevy II/Nova harness has many of the factory connectors already installed on the harness out of the box. Including: the headlight connectors & switch, fuel gauge connnector, dimmer switch, brake switch, heater switch, blower resistor, wiper switch, backup switch, horn, dash light sockets, and warning light sockets. This harness is split into three sections (engine, dome light, & rear) for easy installation and troubleshooting. You'll also find in this kit a harness for the factory air, a high output alternator pigtail with the connector installed, two door jam switches, 12 instrument panel light bulbs, eight harness mounting clamps, a custom Painless mounting plate for the fuse block, and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation.

    1966-1967 Chevy II Nova Wiring Instructions (PDF)

  • Painless 10127 1966-1976 Mopar Muscle Car 21 Circuit Wiring Harness
    Painless 10127 1966-1976 Mopar Muscle Car 21 Circuit Wiring Harness
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    One thing to never forget - the wiring in your muscle car is forty years old and updating to modern and safe components is easy. This Painless Wiring harness features many pre-wired connections and is color coded to make installation a snap. This customizable 21 circuit harness can be used in almost any application where you want Mopar color coded wires. This harness elimintes the troublesome bulkhead connector and uses our unique covered micro-fuse block. Also featured is an auxiliary circuit with a 20 amp relay for accessories such as fog lights, or an electric fuel pump. Each wire is custom printed with the circuit identification for easy installation. 

    Designed for 1966-76 Chrysler/Mopar muscle cars including Baracuda, Imperial, Belvedere, Satellite, Charger, GTX, Dart, Road Runner, Challenger, Demon and Duster. 

    1966-1976 Mopar Muscle Car Wiring Instructions (PDF)

     

     

  • Garage Sale - Speedway GM Engine Wiring Harness, 1999-02 LS1
    Garage Sale
    Garage Sale - Speedway GM Engine Wiring Harness, 1999-02 LS1
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                Please view the product's page for more information
            
  • American Autowire 500423 1955-1956 Chevy OEM Style Wiring Harness
    American Autowire 500423 1955-1956 Chevy OEM Style Wiring Harness
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    If you need a harness that has both OEM and modern features, this is the one for you.  This Classic Update wiring harness from American Autowire allows you to plug into the original gauges and dash accessories, headlights, taillights and heater controls.

    Included are connectors for most aftermarket gauges, steering columns, air conditioning, power windows, locks and seats and stereos. Headlight, ignition and dimmer switches included. For use with 1955-1956 Chevy passenger cars, wagons and Nomads only.

    This harness makes use of the stock key and tumbler. If a new key and tumbler are needed, they are available from the manufacturer.

    1955-1956 Chevy OEM Wiring Instructions (PDF) 

  • American Autowire 510063 1961-64 Chevy Impala OEM Style Wiring Harness
    American Autowire 510063 1961-64 Chevy Impala OEM Style Wiring Harness
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                So you finally found that perfect Impala project and the mice decided to make a nest out of the wiring. This harness will replace the original plus it uses a modern fuse panel and also includes the plugs for a newer GM style or your '61-'64 column. The dash harness will hook to your stock gauges but you can also unplug it and use aftermarket gauges. It will allow you to rewire your car the way you want without the pain. 
            
  • Garage Sale - MOPAR Engine Wiring Harness, P/N 56051395AC
    Garage Sale
    Garage Sale - MOPAR Engine Wiring Harness, P/N 56051395AC
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    MOPAR part number : 56051395AC

     

    These MOPAR factory wiring harnesses are garage sale priced because they are different than what we currently offer.  Please check your application before ordering.

     

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

     

  • Garage Sale - MOPAR Front Wiring Harness, Part Number 56051237AD
    Garage Sale
    Garage Sale - MOPAR Front Wiring Harness, Part Number 56051237AD
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    This is garage sale priced because it has been discontinued. 

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 

     

    Complete fron twiring harness for Mopar part number: 56051237AD 2003 & 2004 Dodge Ram 1500, 2500, 3500