1971-73 Mustang
Classic Update Series™ Wiring System (Part # 510662)

1971-73 Mustang RestoMod Wiring Harness System
Look at everything that's included in this wiring kit!
Detailed instruction sheets also included, but not shown.
(click image to enlarge)

This is one of the most complete wiring systems in the industry.  Take a look at the numerous items and features it contains, including:

  • Harness is laid out and formed to allow for nearly all aftermarket accessories such as: gauge packages, wiper systems, heat and air conditioning systems, etc.
  • Fuse box designed to fit behind the glove box assembly. New ATO fuse panel allows for easy fuse and circuit breaker accessibility.
  • Many original switch connector bodies!
  • Engine wiring includes feeds for coil, aftermarket tachometer, water temperature, oil pressure, brake warning (with later updated extension if necessary), and electronic speedometer (if necessary).
  • Heavy gauge alternator feed wire is provided for a typical 1-wire, high-powered installation.
  • Steering column connectors can plug directly into most aftermarket steering columns or stock '71-'73 Mustang columns using the adapter and terminals included in the kit.
  • Separate under dash courtesy lamp assemblies are also included for use along with the original dome/interior lighting feeds.
  • Instrument cluster wiring is designed with a "cluster harness disconnect" system for easy service and assembly. Original style terminals and PC board connectors are provided for stock cluster connections. The system will also connect to most popular aftermarket gauge packages such as CLASSIC INSTRUMENTS, DAKOTA DIGITAL, AUTOMETER, VDO, and others.
  • Complete plug-and-play Gauge-Pack and floor console clock harnesses include correct lamp sockets and connections.
  • Front lighting includes extra-long leads that can be routed for stock or custom applications. All head light, parking light, grill mounted light, and directional light leads, along with a switched trigger wire for an electric fan relay (usually recommended with AC) are provided. Mating terminals and connectors are also provided to complete the custom installation.
  • Rear body harness assembly plugs into the main harness in the driver's side "A-pillar" location, and our longer leads allow for stock or custom routing of the wires.
  • Rear body wiring includes backup light lead wires with correct lamp sockets, stop and tail light lead wires with correct lamp sockets, dome light leads, terminals, connectors and lamp sockets to mate with the license plate lamp and side marker assemblies, and fuel tank sender wire with trunk grommet and molded fuel tank connection.
  • Standard turn signal flasher, hazard flasher, and horn relay mounted on harness.
  • New floor dimmer switch is provided for ease of installation. Wire length and connection accommodate original floor mount dimmer switch.
  • New Ford style headlight switch with internal circuit breaker, adjustable length shaft, and custom knob.
  • New windshield wiper/washer switch.
  • New firewall grommet for the engine and front light wiring to pass through to allow for easy installation with original or custom routing.
  • Many original style light sockets, switch body connectors, terminals, etc.
  • All mounting brackets and required hardware supplied.
  • Detailed color schematics and easy to understand installation instructions.
  • This product covers all 1971-73 Mustang model combinations including the Mach One.

OPTIONAL PACKAGES can be added to this system, depending on your requirements.

  • Optional Alternator Conversion Harness - allows use of a Delco CS130-D (serpentine belt, internal fan) series internally regulated alternator - Part # 500295
  • Optional Alternator Conversion Harness - allows use of a 1984-99 Delco CS external fan series, internally regulated alternator - Part # VAK6986CS
  • Optional Alternator Conversion Harness - allows use of a Ford 3G series internally regulated alternator - Part # 500802
  • Optional Courtesy Light Delay Module Kit - Part # 510197
  • Optional Torque Converter Lock-Up Switch Update Kit - Part # 500412
  • Optional Terminal Crimping Tool Set - Part # 93963818

Some optional packages may not be available for all year/model vehicles. See catalog for more details.

Product Notice

Our Classic Update Series™ wiring system is designed for an upgraded/modified vehicle. Consequently, it:

  • does not support an ammeter, but will support a voltmeter.
  • does not support a stock generator, voltage regulator, or externally regulated alternator, but will support an internally regulated Delco "SI" Series or 1-wire alternator. Some adapters may be available for use with other internally regulated alternators. Refer to our online catalog.
  • does not connect to factory-original wiring since this complete system will replace all of your original wiring.

This Classic Update Series™ Wiring System is recommended only if you are building a fully customized, mostly customized, retro-mod/retro-rod type of vehicle. It is designed for that purpose. If your goal is to keep your vehicle to its factory-original or primarily factory-original configuration, we highly recommend that you purchase our individual Original Design Series wiring harnesses instead, then make any wiring modifications necessary to accommodate your upgrades/modifications.

All our wiring is Made in America

PRICE and BUY this Classic Update Series™ wiring system (Part # 510662).

Need Help?  Not sure if you should purchase our Original Design Series™, RestoMod Series™ or Classic Update Series™ Wiring System?  Here are some questions you can answer to help you make the right choice.

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