A lot of aftermarket products are produced and designed to connect via a ISO harness, certainly the majority of Bluetooth car kits are provided with ISO connections as standard. These kits are designed by their manufacturers specifically because ISO is a standard connection used in a lot of older (and some more recent) vehicles. This system is used for several reasons, but mainly for reducing costs & to keep the products standard without too many SKU’s (Stock Keeping Units) e.g. to remove the need for one kit for each type of vehicle or radio per manufacturer. You can see these will soon add up to a lot of different versions of the same products (SKU’s).
ISO is a universal system that was used by a lot of vehicle manufacturers up to several years ago. The ISO connection is made up of a group of wires, which all have a standard and specific position within the harness. Each wire within the harness represents a specific connection to a device within the vehicle. For example the front right, back right, front left and back left speakers always hold the same position within the ISO harness no matter which vehicle it is located in. This allows the manufacturers of the products to produce a kit that operates in exactly the same way no matter what the device is connected too. By using ISO harness’s you negate the need to piggy back and/or solder connections when fitting the product.
However more and more manufacturers are starting to use their own wiring systems within their vehicles, this creates a small problem when installing the kits as connections will have to be made manually if the harness is different. So connecting specific speaker wires to the correct equivalent within the harness (each case will be different for the majority of vehicles) there is an easy alternative to this problem, the ISO2CAR adapter.
ISO2CAR wiring harnesses are made specifically to avoid this problem. There are around 20 to 30 different types of harness’ available covering the vast majority of vehicles. The ISO2CAR harness is a connection device that will connect into the products ISO harness, then into the vehicle harness making the installation much more simple and pain free. The vast majority of vehicles now use their own wiring systems so ISO2CAR adapters are more important when installing aftermarket devices into your vehicle.
ISO2CAR harnesses can be used when the vehicle doesn’t have an amplified or upgraded audio system, if this is the case a Drive and Mute cable will be needed where available.