1. Introducción
The ACV 42SFO008+ML Steering Wheel Control Adapter allows you to retain the functionality of your vehicle's factory steering wheel audio controls when installing an aftermarket car stereo. This adapter is specifically designed for Ford C-Max models manufactured from December 2010 onwards and Ford Focus models manufactured from 2011 onwards. This manual provides essential information for the correct installation and operation of your adapter.
2. Información de seguridad
- Desconecte siempre la batería del vehículo antes de comenzar cualquier instalación eléctrica para evitar cortocircuitos y daños.
- If you are unsure about any step of the installation process, consult a qualified professional installer.
- Ensure all electrical connections are secure and properly insulated to prevent hazards.
- Do not attempt to modify or disassemble the adapter module.
3. Contenido del paquete
Verifique que todos los artículos enumerados a continuación estén presentes en su paquete:
- ACV 42SFO008+ML Main Interface Module
- Arnés de cableado específico del vehículo
- Infrared Emitter/Receiver Module (small black box)
- Universal Head Unit Connection Cable (with KEY1, KEY2, GND, and 3.5mm jack)

Figura 1: ACV 42SFO008+ML Main Interface Module with vehicle-specific wiring harness, including various connectors and the infrared emitter module.

Figura 2: Universal Head Unit Connection Cable, featuring labeled wires for KEY1, KEY2, GND, and a 3.5mm jack for connecting to an aftermarket stereo's steering wheel control input.
4. Configuración e instalación
Follow these steps for proper installation. It is recommended to consult your vehicle's service manual and your aftermarket head unit's instruction manual for specific wiring diagrams.
- Preparación: Disconnect the negative terminal of your vehicle's battery. Carefully remove the factory car stereo from the dashboard.
- Conectar el arnés del vehículo: Connect the vehicle-specific wiring harness from the ACV adapter to the corresponding connectors in your vehicle's dashboard. These typically connect to the factory radio harness.
- Conecte el arnés de la unidad principal: Connect the ACV adapter's main harness to your aftermarket car stereo's ISO connectors. Ensure all power, ground, and speaker wires are correctly matched.
- Connect Steering Wheel Control Wires: Identify the steering wheel control input wires on your aftermarket head unit. These are often labeled as SWC, KEY1, KEY2, or Remote Input. Connect the