Sale

Ignitions and Electrical› Wiring Harnesses

AMERICAN AUTOWIRE

64-66 Mustang Wiring Harness System

$1,049.00 $996.55 Save $52.45

SKU: A07L 510125

In Stock
In Stock
Ships by Jun 8
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The American Autowire 510125 Classic Update Kit is a complete rewire solution for 1964-1966 Ford Mustangs. It features an updated ATC fuse panel, modern GXL wire, a pre-built dash harness with gauge cluster disconnect, and extra-long leads for custom routing. This kit is designed to accommodate modern accessories like EFI and aftermarket gauges, and it includes a 175 amp mega fuse kit for high-output charging systems.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandAMERICAN AUTOWIRE
Part NumberA07L 510125

Videos

1964-1966 Mustang Classic Update Kit on Two Guys Garage

1964-1966 Mustang Classic Update Kit on Two Guys Garage
American Autowire Harness - Underdash | 1965 Mustang Fastback Restoration

American Autowire Harness - Underdash | 1965 Mustang Fastback Restoration

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy