1. Introduction
The Phonocar 4/131 Signal Adapter is designed to facilitate the integration of an aftermarket car stereo or head unit with a vehicle's original amplified sound system, such as a Bose system. This adapter ensures proper signal conversion and compatibility, allowing the new head unit to function correctly with the existing factory amplifier and speakers.
This manual provides essential information for the correct installation, operation, and maintenance of your Phonocar 4/131 Signal Adapter.
2. Safety Information
- Always disconnect the vehicle's battery before beginning any electrical installation to prevent short circuits and damage.
- Ensure all connections are secure and properly insulated to avoid electrical hazards.
- If you are unsure about any part of the installation process, consult a qualified professional car audio installer.
- Do not modify the adapter or its wiring. Unauthorized modifications can void the warranty and cause damage.
- Keep the adapter away from moisture and extreme temperatures.
3. Package Contents
- 1x Phonocar 4/131 Signal Adapter with integrated wiring harnesses
4. Setup and Installation
The Phonocar 4/131 Signal Adapter is designed for plug-and-play installation in compatible vehicles. It connects between your new aftermarket head unit and the vehicle's existing wiring harness for the amplified sound system.
4.1. Compatibility
This adapter is compatible with original amplified rear and front speaker systems, including Bose systems, in the following vehicle models (models without original navigation unless specified):
- Alfa Romeo: 147 (2000 onwards), 156 (up to 2005), 159 (2005 onwards), Mito (2008 onwards), GT (2003 onwards), Brera (2005 onwards)
- Lancia: Ypsilon, Musa
- Mazda: 3, 5, 6 (with Bose system)
- Mercedes-Benz: A-Class (W168, 1997-2005), C-Class (W202, 1997-2000), E-Class (W210, 1999-2002)
- Nissan: 350Z (2004-2008), Murano (2006 onwards) (with original Bose system)
- Peugeot: 806 (1994-2002)
- Porsche: Boxster (2009 onwards)
4.2. Installation Steps
- Preparation: Ensure the vehicle's battery is disconnected. Remove the existing car stereo or head unit from the dashboard.
- Identify Connections: Locate the vehicle's factory wiring harness for the audio system.
- Connect Adapter: Connect the appropriate end of the Phonocar 4/131 adapter's wiring harness to the vehicle's factory wiring harness. The connectors are designed to fit only one way.
- Connect to New Head Unit: Connect the other end of the adapter's wiring harness to your new aftermarket head unit. Ensure all connections are firm.
- Secure Wiring: Route and secure all wiring to prevent pinching or interference.
- Test: Reconnect the vehicle's battery. Turn on the new head unit and test all audio functions, including front and rear speakers, balance, and fade.
- Final Assembly: Once confirmed working, carefully reassemble the dashboard components.
Figure 1: Phonocar 4/131 Signal Adapter with its integrated wiring harnesses and various automotive connectors. This image illustrates the physical components involved in connecting an aftermarket head unit to a vehicle's original amplified sound system.
5. Operating the Adapter
The Phonocar 4/131 Signal Adapter is a passive component that facilitates communication between your aftermarket head unit and the vehicle's original amplified sound system. Once correctly installed, it operates automatically. There are no user-adjustable settings on the adapter itself. All audio controls (volume, balance, fade, tone) will be managed directly through your aftermarket head unit.
6. Maintenance
The Phonocar 4/131 Signal Adapter requires minimal maintenance. Ensure it is installed in a dry, secure location within the dashboard, away from direct heat or moisture. Periodically check connections for looseness, especially if experiencing audio issues. Do not attempt to open or repair the adapter yourself.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers. |
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| Distorted or poor sound quality. |
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| Only some speakers are working. |
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If troubleshooting steps do not resolve the issue, contact Phonocar customer support or a professional installer.
8. Specifications
- Model: Phonocar 4/131 (04131)
- Product Type: Signal Adapter / Cable Adapter
- Dimensions (LxHxP): Approximately 250 x 110 x 50 mm (packaging dimensions, actual adapter unit is smaller)
- Color: Multi (adapter unit is black, wiring is multicolored)
- Compatible Systems: Original amplified car audio systems, including Bose systems
- Number of Ports: 1 (referring to the main connection point for the vehicle harness)
- Power Plug Type: No external power plug (integrated into vehicle's wiring)
9. Warranty Information
The Phonocar 4/131 Signal Adapter comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, accident, abuse, misuse, natural disaster, or unauthorized modification. Please retain your proof of purchase for warranty claims.
10. Customer Support
For technical assistance, warranty claims, or further information regarding your Phonocar 4/131 Signal Adapter, please contact your retailer or visit the official Phonocar website. When contacting support, please have your product model number (4/131 or 04131) and proof of purchase readily available.
Phonocar Official Website: www.phonocar.it (Please note: This link is provided as a general reference and may not be active or specific to your region.)
