1966 Cadillac DeVille Headlight Wiring Harnesses

A guide on how to install a universal wiring harness in a car. Read tips on properly wiring taillights, headlights, gauges, ignition switch, steering column and more.

Check out this headlight wiring and taillight wiring diagram.

In this Tech Tip, John answers a customer question about the Speedway 12 Circuit Wiring Harness.

In this Tech Tip, a returning customer asks for advice on wiring harnesses for his ’29 Ford roadster project.

This project consists of using welding cable to relocate a battery to the trunk of a 1967 Chevelle. Learn the benefits of using welding cable over normal battery cable and how line clamps are used to secure the wire to the frame rail.

Follow along as Jeff installs Mr. Gasket aluminum finned valve covers and gaskets to his iron-head engine. Learn how to prep the covers for a fresh coat of engine paint!

This Dakota Digital Instrument Cluster, modeled after a factory SS dash, is a must for your Classic car or Muscle car. Check out this article to learn about the unique features and how it requires only one cable to plug in for install!

Sometimes, a simple paint job can cause a project to spiral out of control. In the case of Steve's '66 Chevelle, it came out way better than anyone expected.

Learn how to equip your car with A/C by installing the Vintage Air GenIV SureFit Complete Kit. Jeff installs this kit in his 1967 Chevelle while making some vent modifications to enhance the look and direct air better.

See how to properly install a DeWitt's Direct Fit radiator in a 66-67 Chevelle. Learn the benefits of Black Ice coating on this radiator including optimal heat transfer.