Overview
ISO 10487-1:1992 defines the dimensions and general requirements for passenger car radio connections. It specifies the physical layout and connector features used to link car radios to vehicle wiring harnesses - covering both permanently fitted and extractable car radios. The standard determines the position of antenna sockets, the multi‑pole connector form and contact allocation, and sets basic mounting and interfacing rules.
Key topics and requirements
- Multi‑pole connector geometry: The socket supports a maximum of 26 male contacts grouped into three parts (A, B and C). Contact tabs are specified (2.8 × 0.5 mm) in accordance with ISO 8092‑3.
- Contact allocation: Contact positions and intended functions (power, speaker outputs, ignition-switched battery, illumination, etc.) are defined in a contact allocation table to ensure interoperability between radios and vehicle harnesses.
- Antenna socket placement: Main and optional sub‑antenna sockets must be mounted at the rear of the radio; if a sub‑antenna socket exists it is located symmetrically to the main socket about the radio’s horizontal axis.
- Mechanical features:
- Each connector part has a polarizing key so A/B/C parts only mate with correct sockets.
- Locking zones and a specified distance between the trim plate and connector face; the plug becomes part of the vehicle harness for extractable radios.
- Provision for a blade‑type fuse space compatible with ISO 8820‑2.
- Electrical characteristics: Impedance and related connection properties are to comply with IEC 268‑15.
- Future provisions: Some contacts are reserved for future applications (e.g., RDS) and Part 2 of ISO 10487 (under study) will cover tests and performance requirements.
Practical applications and users
Who uses ISO 10487-1:1992?
- Automotive OEM electrical and body engineers specifying radio harness interfaces.
- Car radio manufacturers designing head units to fit a standard vehicle connector.
- Aftermarket radio and accessory suppliers ensuring compatibility with factory wiring.
- Harness and connector manufacturers producing mating plugs and sockets.
Practical benefits:
- Ensures plug‑and‑play compatibility across vehicles and radios.
- Reduces installation errors by standardizing pin assignments and mechanical keys.
- Simplifies service and replacement of extractable radio units.
Related standards
- ISO 8092‑3 - Road vehicles: multi‑pole connector tabs (dimensions and requirements)
- ISO 8820‑2 - Road vehicles: blade‑type fuse‑links (dimensional requirements)
- IEC 268‑15 - Sound system equipment: preferred matching values / impedance
Keywords: ISO 10487-1:1992, passenger car radio connections, multi-pole connector, antenna socket, contact allocation, car radio harness, extractable car radios, connector dimensions.