64-66 Mustang Wiring Harness Classic Update Series


SKU: AWI-AA510125

We are currently expecting a shipping delay with this product. Please allow for shipping.

Delivery Disclaimer

Most of our inventory ships within 7 days of purchase, however, many of our parts are special orders. Please allow a minimum of 2 weeks for shipping. Some parts are made to order and require longer delivery times. I you have any questions regarding delivery times, please call: 619-401-6900

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.


This is THE wiring kit for a truly painless installation and an absolute must for any resto-mod project. Don’t bother looking anywhere else, this is the kit you need. We know. We’ve used most of the classic Mustang wiring kits on the market and in our opinion, they fall short of the American Autowire Classic Update Series kits.
The instructions are clear, well-illustrated and model year specific. The quality is outstanding and if you’re building a resto-mod, this kit incorporates provisions for additional accessories and aftermarket components. When it comes to wiring Mustangs in our shop, the one and only choice is American Autowire, every time.
Most aftermarket Chassis harnesses are not equipped for aftermarket parts. THIS HARNESS SUPPORTS AFTERMARKET COMPONENTS. Some companies design chassis harnesses thinking that you’re going to put all of the same stock components back in the car and don’t equip their harness to handle the load. Most of the time, they don’t even include the components needed to run the Mustang switches. Ever receive a Chassis harness and wonder why it’s called a Mustang Harness and not a universal harness?

•    Original Ford styled headlight switch connector
•    Headlight relays designed for high powered halogen or Xenon headlamp upgrades
•    Separate Relay for aftermarket or stock fog lamps
•    Correct ignition switch placement for use with your stock bezel and tumbler
•    Correct ignition switch connector
•    Turn signal flasher and hazard flasher mounted on fuse panel
•    New ATO fuse box that fits in the center of the firewall
•    Harness supports plug n play style aftermarket accessories
•    Supports Power Windows
•    Supports Power Door Locks
•    Supports Ac & Heat kits
•    Supports Gauge packs such as Autometer, Stewart Warner, Dakota Digital etc.
•    Instrument cluster “Cluster Disconnect
•    Steering Column connectors supports Aftermarket columns such as IDIDIT
•    Supports under dash and dome lighting
•    Rear Chassis extension includes tail light sockets and fuel tank sender wire
•    Engine wiring includes feeds for coil, tach, water, temp, oil pressure, brake warning and electric speedo if needed.
•    Supports 1 wire alternators

Additional information

Weight 1 lbs
Dimensions 1 × 1 × 1 in


There are no specifications details for this product


There is no video available for this product.


This part will fit the following types of vehicles:

  • 1964 Ford Mustang
  • 1965 Ford Mustang
  • 1966 Ford Mustang

Installation Tips

There are no installation tips available for this part. If you have any question, please call us at: ["phone"], or use our contact form.


There are no reviews yet.

Be the first to review “64-66 Mustang Wiring Harness Classic Update Series”

Your email address will not be published. Required fields are marked *