The right wiring harness makes a head unit install plug-and-play, with no cutting into your car's factory wiring. This section covers Headunit to ISO harnesses for your stereo brand, vehicle Plug to ISO harnesses and Plug to Bare End leads, Data Interfaces and USB adaptors that keep factory features, and steering wheel control Patch Leads.

Most products are from Aerpro, with Metra Axxess interfaces for selected vehicles. A typical install uses a vehicle harness matched to a head unit harness, plus a patch lead and steering wheel control interface if you want to keep your factory buttons. Check your vehicle model, year and head unit brand to choose the right parts.