It Still Runs is the go-to destination for all things cars. From motors to radiators and everything in between, we've got you covered.

x

What Is an Engine Harness?

by Troy Lambert

Wiring harnesses are like the blood vessels for the electricity in your car. They carry it from place to place so it gets where it needs to go. Different wiring harnesses serve different purposes.

The Heart

The heart of your electrical system is the battery. The alternator makes sure that the battery has power, and a portion of the engine wiring harness carries that power to the fuse box.

The Protector

The fuse box protects your vehicle from electrical fire by stopping the current if it is too great. The engine wiring harness first runs from the engine to the fuse box. The fuse box is where the power branches off and goes back into the engine compartment as well as to the rest of your car.

Back to the Engine

The engine wiring harness then brings power back to the engine and those engine components that need it. These include the computer, the fuel injectors, the wiper and blower motors, and any other electrical component located under the hood.

More Articles