What Is ISO Loom?

An ISO loom is a type of wiring loom (also called a "wiring harness") and connector that is used in car stereos, radios and satellite navigation systems. If you install an aftermarket stereo or similar device in a car without an ISO connector, you will typically need an ISO loom to adapt the new device.

ISO 10487

ISO, short for International Organization for Standardization, is the organization that, in 1992, set the industry standard for car radio/stereo connections. In car audio terminology, the actual standard, ISO 10487, is commonly shortened to just ISO.

Connections

An ISO connector includes at least two--and up to four--sets of pin connectors, typically labeled 'A,' 'B,' 'C' and 'D.' The required sets (A and B) control simple functions, such as power and speaker strength, while the optional sets (C and D) are only used for advanced functions, such as GPS control.

Cars

Most older car models (pre-1992) and several newer car models, including the Jaguar S-Type and Mercedes-Benz E-Class, do not come with industry-standard ISO 10487 connectors. If installing an aftermarket stereo or similar device in these cars, you will need an ISO loom adapter.

Devices

Some car stereos and related devices, including various Kenwood stereos and Parrot GPS devices, also require special ISO looms to adapt to most car models.

References

• isham research: ISO & DIN Radio and Satellite Navigation Connectors
• Parrot.com: Wiring diagram for Opel ISO Adapter
• Just Kenwood Car Audio: Kenwood ISO wiring loom
• Cellular-Blowout.com: ISO Harness Jaguar S and X type (PCS)
• Car Stereos 4U: Mercedes Car ISO Wiring Harness Adaptor Leads

Resources

• International Organization for Standardization: ISO 10487-1:1992
• International Organization for Standardization: ISO 10487-1:1995