Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Chassis Wire Harnesses

Few things can be as frustrating - and challenging - on your build as the wiring process. Speedway Motors is here to help with easy to install Chassis Wire Harnesses. We offer a variety of circuit options from the best in the business like Painless & American Autowire. All kits include detailed instructions to help with the install. Want more help? No problem! Our award winning techinical staff will help you through the entire process to make sure you get the right harness and get it installed correctly on your ride.

"Street Rod, Chassis Wire Harnesses" Page 1 of 1

  • Painless Wiring 10104 21 Circuit GM Pickup Chassis Wiring Harness
    New
    Painless Wiring 10104 21 Circuit GM Pickup Chassis Wiring Harness
    (Part #91010104)
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    This customizable 21 circuit - 12 fuse w/ horn relay and Maxi Fuse pickup chassis wiring harness is made from Painless Performance. You'll find that the ample wire lengths make this kit especially suited for trucks with long beds and extended cabs.  These Painless wiring harnesses feature many pre-wired connections and are color coded to make installation a snap. Included with this harness are the following parts: a GM engineered fuse block & Painless mounting bracket, GM turn signal connectors, pre-wire plugs for the headlights, and a dimmer switch. Application intended for non-fuel injected engine and a non-electronic transmission.

    Includes Circuits for:

    • A/C & Heat
    • Accessory / Cigarette Lighter
    • Backup Lights
    • Brake Lights
    • Charging
    • Dome Light
    • Electric Choke
    • Emergency Flashers
    • Fan Relay Activation Power
    • Fused Power Source
    • Headlights
    • Horn (Relay)
    • Ignition Coil
    • Instrument Panel Lighting and Gauges ( Included wires for: fuel gauge, oil gauge, tachometer, temperature gauge, and voltmeter)
    • Park Lights
    • Radio/Clock (Constant and Switched) 
    • Starting
    • Tail Lights
    • Third Brake Light
    • Turn Signals
    • Wipers

    Connectors included:

    • GM Steering Column Turn Switch
    • Two Headlight Pigtails
    • 10SI & 12 SI Alternator
    • Dimmer Switch

  • Speedway Economy 12 Circuit Wiring Harness
    Speedway Economy 12 Circuit Wiring Harness
    (Part #91064017)
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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
    (Part #60815264)
    x
                

    Available for 2003 Chevy/GMC & Cadillac models.

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

  • Painless 10106 22 Circuit Wiring Harness for 1975 and Later CJ Jeeps
    New
    Painless 10106 22 Circuit Wiring Harness for 1975 and Later CJ Jeeps
    (Part #91010106)
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    This 22-circuit wiring harness from Painless Performance is for your 1975 and later CJ Jeep. This is a customizable kit that routes the wires through a connector and the ignition switch is in the column. This kit includes GM column mounted ignition switch connectors and a GM column mounted turn signal switch connector pre-terminated and ready to install. Also included are pre-wire plugs for headlights and the dimmer switch.

    This harness includes circuits for:

    • A/C & Heat
    • Accessory / Cigarette Lighter
    • Backup Lights
    • Brake Lights
    • Charging
    • Dome Light
    • Electric Choke
    • Emergency flashers
    • Fan Relay Activation Power
    • Fused Power Source
    • Headlights
    • Horn (Relay)
    • Ignition Coil
    • Instrument Panel Lighting and Gauges (Includes wires for: Emergency Brake Light, Four-wheel drive light, fuel and oil gauge, tachometer, temperature gauge, and voltmeter)
    • Park Lights
    • Radio/Clock (Constant and Switched) 
    • Starting
    • Tail Lights
    • Third Brake Light
    • Turn Signals
    • Under Hood Light
    • Wipers

     

     

  • Garage Sale - Speedway Universal 20 Circuit Wiring Harness
    Garage Sale
    Garage Sale - Speedway Universal 20 Circuit Wiring Harness
    (Part #UP50079)
    x
                Please view the product's page for more information
            
  • Painless Wiring 21 Circuit Wiring Harness
    Painless Wiring 21 Circuit Wiring Harness
    (Part #91064029)
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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
    (Part #91064027)
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                Please view the product's page for more information
            
  • Garage Sale - Ford Brake Control Adapter Harnesses
    Garage Sale
    Garage Sale - Ford Brake Control Adapter Harnesses
    (Part #60815260)
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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
    (Part #60815263)
    x
                

    Available for 1999-2002 Chevy/GMC & Cadillac models.

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

  • Painless Wiring 10202 Universal 28 Circuit / 18 Fuse Chassis Harness
    Painless Wiring 10202 Universal 28 Circuit / 18 Fuse Chassis Harness
    (Part #91064031)
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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 10220 28 Circuit Remote Trunk Harness
    Painless Wiring 10220 28 Circuit Remote Trunk Harness
    (Part #91001020)
    x
                Please view the product's page for more information
            
  • Painless Wiring 50003 Universal 21 Circuit Pro Street Chassis Wiring Harness
    New
    Painless Wiring 50003 Universal 21 Circuit Pro Street Chassis Wiring Harness
    (Part #91050003)
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    This 21 circuit wiring harness from Painless Performance is for your Pro Street Chassis and includes an optional connector if you want to use a GM column mounted ignition switch. The included switch panel is a roll bar mount 8 switch rocker panel. This panel is pre-wired and is a direct plug and play into this harness. This harness kit also comes with a Painless mounting plate, grommets, terminal assortment kit, and the necessary connectors for your turn signal switch, headlights, and alternator. All wires are custom printed with the circuit identification as well as using GM color codes for easy installation. Made in the USA!

    Installation Instructions (PDF) 

    This harness includes these circuits:

    • Accessory #1
    • Accessory #2
    • Brake Lights
    • Charging
    • Dome Light
    • Electric Fuel Pump #1 
    • Electric Fuel Pump #2 
    • Electric Water Pump 
    • Emergency Flashers
    • Fan Relay Activation Power
    • Fused Power Source
    • Headlights
    • Horn
    • Ignition Coil
    • Park Lights
    • Radio and Gauges
    • Starting
    • Tail Lights
    • Third Brake Light
    • Turn Signals
    • Wipers

     

     

  • Painless Wiring 10130 14 Circuit Remote Mount Microfuse Wiring Harness
    Painless Wiring 10130 14 Circuit Remote Mount Microfuse Wiring Harness
    (Part #91010309)
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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 28 Circuit Wiring Harness
    Painless Wiring 10201 GM 28 Circuit Wiring Harness
    (Part #91064030)
    x
                

    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)

     

  • Garage Sale - Speedway GM Engine Wiring Harness, 1999-02 LS1
    Garage Sale
    Garage Sale - Speedway GM Engine Wiring Harness, 1999-02 LS1
    (Part #UP43977)
    x
                Please view the product's page for more information
            
  • Garage Sale - MOPAR Engine Wiring Harness, P/N 56051395AC
    Garage Sale
    Garage Sale - MOPAR Engine Wiring Harness, P/N 56051395AC
    (Part #56051395.AC)
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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
    (Part #56051237.AD)
    x
                

    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

     

  • Painless Wiring 50002 Universal 21 Circuit Pro Street Chassis Wiring Harness
    New
    Painless Wiring 50002 Universal 21 Circuit Pro Street Chassis Wiring Harness
    (Part #91050002)
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    This 21 circuit wiring harness from Painless Performance is just what you need for your street chassis. This harness includes an optional connector if you want to use a GM column mounted ignition switch. It also has a terminal assortment kit, with the necessary connectors for your turn signal switch, headlights, and alternator. Each wire is custom printed with the circuit identification as well as using GM color codes for easy installation. Made in the USA!

    Installation Instructions (PDF) 

    This harness includes these circuits:

    • Accessory #1
    • Accessory #2
    • Brake Lights
    • Charging
    • Dome Light
    • Electric Fuel Pump #1 
    • Electric Fuel Pump #2
    • Electric Water Pump 
    • Emergency Flashers
    • Fan Relay Activation Power
    • Fused Power Source
    • Headlights
    • Horn
    • Ignition Coil
    • Park Lights
    • Radio and Gauges B+ (Fuel Gauge, Oil Gauge, Tachometer, and Temperature Guage)
    • Starting
    • Tail Lights
    • Third Brake Light
    • Turn Signals
    • Wipers