Alloy Metal Products Wiring Harness Under Dash 1966

Alloy Metal Products: 66-UD
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Alloy Metal Products Wiring Harness Under Dash 1966
Alloy Metal Products

Product Description

Alloy Metal Products Under Dash Wiring Harness for all 1966 Mustangs.

Faulty wiring can be difficult to trace and very frustrating, replace yours today with this direct replacement harness from Alloy Metal Products. This factory style harness includes the fuse block, lamp sockets and the correct color coded wires and connectors just like the originals. With this under dash wiring harness having the correct color coded wiring and connectors installation is pretty straight forward.

- Fits all 1966 Mustangs
- Easy Installation
- Original Color Coded Wiring
- Correct Original style Connectors

This under dash wiring harness will fit through the firewall behind the instrument cluster, it supplies power to the instrument panel cluster harness. This harness will fit under the dash on your 1966 Mustang and will help provide power to the door courtesy light harness, wiper motor and other dash connections.

Alloy Metal Products is one of the leading manufacturers of wiring for classic Mustangs. Alloy Metal Products has a long and storied history with the Mustang. In fact, Alloy Metal Products is one of the most respected aftermarket wiring suppliers in the industry, working directly with hundreds of customers to make their Mustang wiring projects a reality.

Purchase a new Alloy Metal Products Under Dash Wiring Harness for your 1966 Mustang from CJ Pony Parts today!

Similar Mustang Parts

similar Mustang parts More Underdash Wiring  

Installation Instructions

Mustang Installation

Mustang Applications

This product will fit the following Ford Mustang years:

Product Reviews

Write a review
Alloy Metal Products Wiring Harness Under Dash 1966 is rated 4.5 out of 5 by 2.
Rated 5 out of 5 by from Like a glove! The 66 mustang wiring harness was a perfect fit. All connectors fit existing wiring. The quality was excellent and the installation was fairly easy. The gauge lighting sockets were not nearly as tight as the originals, but still stayed in position. In fact, the led lights went in much, much easier in the new wiring harness. It did not come with any installation instructions, but with the existing wiring it was easy to figure out. I would have appreciated a wiring schematic. Overall, I was very pleased with the product.
Date published: 2015-12-09
Rated 4 out of 5 by from Solid harness with OEM colors and connectors Installed just like OEM. As previously reviewed the instrument sockets aren't as tight in the dash holes but do hold the bulbs more secure. Can't give it 5 stars because the headlight plug was wired 180 out. Couldn't figure out why I had power to the headlight switch but no brake lights, parking or head lights. Once I went on line and found the right match it only took 5 minutes to pop the 8 wires out and relocate.
Date published: 2015-12-12
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Product Questions


we are after underdash wire loom for 1966 Australian delivery mustang

Asked by: rfjc2468
This harness is for left hand drive, not sure if this would work for your application without modification.
Answered by: rk cjpp
Date published: 2015-12-10

Does this wiring harness Have A Attachment for the new Version Of the 1966 mustang stereo ?

Asked by: mota_310
No it would not.
Answered by: rk cjpp
Date published: 2015-11-10

does this harness include the 2 speed wiper motor harness? Also will it connect to the GT instrument panel?

Asked by: dutchman
Yes this is what you will need.
Answered by: rk cjpp
Date published: 2015-11-09

I recently purchased this wiring harness and the emergency light switch is wired into it.  Do you have a wiring schematic for this harness and is the another flasher that has to be installed in addition to the directional signal flasher

Asked by: guido4u
Unfortunately, we do not have a wiring schematic available.
Answered by: CJ Pony Parts
Date published: 2015-06-01

does this hook up to the gauges and the ignition switch

Asked by: rich g
It supplies power to the instrument panel cluster harness, the console feed harness, door courtesy light harness and other dash connections.
Answered by: CJ Pony Parts
Date published: 2015-05-04

Do I need to splice wire to install neutral safety switch 

Asked by: 66 rob
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