ISO adapters connect an aftermarket head unit to the factory wiring harness without cutting into original cables. They match vehicle-specific plugs to the ISO standard used by most aftermarket stereos, making the install faster, cleaner, and fully reversible. Power, ground, and speaker wires are routed correctly from the start, so everything works the way it should as soon as it’s plugged in.
In cases where the original harness has been modified, damaged, or is missing entirely, loose-end ISO connectors make it possible to rebuild the connection from scratch. Universal adapters can also correct mismatched 12V lines, like reversed ignition and constant power feeds, without the need for manual rewiring. It’s all about simplifying the install while keeping the wiring solid and reliable long-term.
