65 Mustang Wiring Harness Recommendations


Jan 9, 2019
Hi all,

I am looking to replace the wiring (bumper to bumper) in my 65 convertible…recently pulled the heater box and figured it was a good time to do so with more room opened up under the dash. I am trying to decide between the American Autowire Kit 510125 https://www.cjponyparts.com/american-autowire-complete-wiring-harness-classic-update-kit-1965-1966/p/WHC6466/ and a combination of 2 OE kits- an under-dash kit and a CJ’s kit that I’m told should cover everything else bumper-to-bumper https://www.cjponyparts.com/cj-classics-under-dash-wiring-harness-usa-made-for-warning-lights-and-3-speed-heater-built-after-4-1-1965/p/WUD1B/ and https://www.cjponyparts.com/wiring-kit-with-3-speed-heater-and-gauges-v8-coupe-and-convertible-1965/p/WK65H/ . The AAW kit says it is recommended for MODIFIED vehicles…does anyone know why this is? My vehicle is fairly stock…only additional modifications I could see down the road are 4R70W swap, an electric fan, and maybe an improved stereo/sound system. Does the AAW kit include everything I’d need? Fairly simple to install (not a lot of splicing/crimping, etc.?) I have a 1-wire 100 amp alternator; I’m told the stock harness is intended for 60amp max alternators. Other than that, would the stock OE harness be simpler to install, assuming I swap alternators, and still meet all my needs? Does it include everything; would I have to order some other harnesses separately (convertible top, fuel sending unit, just a few I don’t see listed). It looks like I would be spending around the same amount regardless (Over $700), which is more than I want to spend, but figure its better to do it right the first time…


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I partied with that dude!, um girl, um whatever...
Mar 5, 2019
Would like to her recommendations on this too.
I always imagine it comes down to the install more than the kit
but iDK

02 281 GT

Agreed...My wife has great Boobs
10 Year Member
Feb 3, 2009
Wichita Falls, TX
I would imagine the AAW kit specifies modified vehicles because it’s designed to accommodate modern upgrades such as aftermarket gauge clusters and additional circuits for various accessories. The description essentially says modern gauges are plug and play. Makes sense that that particular harness probably wouldn’t be a good choice if you’re looking to rewire a 100% stock vehicle.
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