Car Stereo Install Kits, Harnesses and Wiring

Dash kit and harness: the pair that avoids cutting wires

A dash kit adapts the opening in your dash to a single or double DIN radio, and is listed by make, model and year. The wiring harness adapter plugs into the car's factory connector on one side and offers standard radio leads on the other, so nothing in the car is cut. Titles often name the plug type, such as a 24-pin connector. Steering-wheel control and antenna adapters are sold separately and depend on the vehicle.

Amp wire gauge, speaker adapters and the small cables

Amplifier wiring kits are rated by gauge, and a lower number means thicker wire; size the kit to the amplifier's current draw. Copper cable carries current better than copper-clad aluminum of the same gauge. Speaker adapters let 6.5 inch speakers mount in a 6x9 opening. Auxiliary cables come male to male or male to female, and chargers state output voltage and amperage, usually 5 V for USB.

Questions about Car Stereo Install Kits, Harnesses and Wiring

How do I connect a wiring harness adapter to a new radio?

Match wires by color or function using the diagrams supplied, join them with crimp connectors or solder, and insulate every joint. Work at a bench rather than in the dash, and disconnect the car battery before plugging in.

Do I really need a wiring harness adapter?

It is strongly recommended. The adapter plugs into the car's original connector, so you avoid cutting wires, keep the install reversible and reduce wiring mistakes. It is usually matched to your make, model and year.

What gauge wire does my amplifier need?

It depends on the amplifier's current draw and the cable length. The amplifier manual usually gives a recommended gauge and fuse size. Higher-power amplifiers need thicker cable than small ones.