1. Introduzione
This manual provides instructions for the Metra 70-9003 Radio Wiring Harness. This harness is designed to simplify the installation of an aftermarket radio into select Audi, BMW, and VW vehicles manufactured from 2002 onwards. It eliminates the need for cutting factory wiring, ensuring a clean and straightforward connection.
2. Contenuto della confezione
- Metra 70-9003 Wire Harness
- Manuale di istruzioni
Image: The Metra 70-9003 Radio Wiring Harness as it appears in its retail packaging, showing the product label and part number.
3. Specifiche
| Marca | Metra |
| Numero di modello | 70-9003 |
| Materiale | Polyvinyl Chloride (PVC), Polyethylene (PE) |
| Dimensioni articolo (L x P x A) | 7.75 x 4.5 x 2 pollici |
| Peso dell'articolo | 0.8 once (22.68 g) |
| Tipo di connettore | Collegare |
| Usi consigliati | Sostituzione della radio |
| Diametro del filo | 18 Mils |
| Compatibilità | Audi/BMW/VW 2002-Up (Confirm with Metra Vehicle Fit Guide) |
4. Istruzioni per l'installazione
4.1 Generale Finitoview
The Metra 70-9003 harness is designed for direct plug-and-play integration with your vehicle's factory radio connectors. The color-coded wires on the aftermarket radio side simplify connections, eliminating the need for cutting the vehicle's original wiring.
4.2 Prima di iniziare
- Ensure your vehicle is compatible with the Metra 70-9003 harness. Refer to the Metra Electronics Vehicle Fit Guide or contact Metra tech support for confirmation.
- Scollegare il terminale negativo della batteria del veicolo per evitare cortocircuiti durante l'installazione.
- Gather necessary tools, which may include wire strippers, crimpers, electrical tape, and a multimeter.
4.3 Collegamenti di cablaggio
Match the color-coded wires of the Metra 70-9003 harness to the corresponding wires of your aftermarket radio's harness. Common wire functions are listed below:
- Giallo: Potenza costante 12V
- Rosso: 12V Accessory Power (Switched)
- Nero: Terra
- Blu: Antenna di potenza / AmpAccensione remota lifier
- Arancia: Illuminazione
- Cavi dell'altoparlante: (Green, Purple, Gray, White - solid for positive, striped for negative)
Secure all connections using crimp connectors or solder, and insulate them with electrical tape or heat shrink tubing to prevent short circuits.
Image: The Metra 70-9003 Radio Wiring Harness, displaying its vehicle-specific connector and the color-coded wires for aftermarket radio integration.
4.4 Collegamento al veicolo
Plug the vehicle-specific connector of the Metra 70-9003 harness into the factory radio harness located in your dashboard. Then, connect the aftermarket radio's harness (which is now wired to the Metra harness) to the new radio unit.
4.5 Testing and Reassembly
- Ricollegare il terminale negativo della batteria del veicolo.
- Turn on the vehicle and test the aftermarket radio's functions, including power, audio output (all speakers), balance, fade, and illumination.
- If all functions operate correctly, carefully reassemble the dashboard components.
5. Istruzioni per l'uso
The Metra 70-9003 is a passive wiring harness that facilitates the electrical connection of an aftermarket radio. Its operation is entirely dependent on the functionality of the connected aftermarket radio. Refer to your aftermarket radio's instruction manual for specific operating procedures and features.
6. Manutenzione
The Metra 70-9003 wiring harness requires no regular maintenance. To ensure continued performance, periodically check that all connections remain secure and are free from moisture, corrosion, or physical damage. Avoid pulling on the wires or connectors forcefully.
7. Risoluzione Dei Problemi
7.1 No Power to Radio
- Controllare la scatola dei fusibili del veicolo per verificare che non vi siano fusibili bruciati relativi all'alimentazione della radio o degli accessori.
- Verify the 12V constant (Yellow) and 12V accessory (Red) wires are correctly connected and receiving power using a multimeter.
- Assicurarsi che la batteria del veicolo sia completamente carica e correttamente collegata.
7.2 Nessun suono dagli altoparlanti
- Confirm all speaker wires (Green, Purple, Gray, White - solid for positive, striped for negative) are correctly matched and connected to the aftermarket radio.
- Check the aftermarket radio's settings for proper balance and fade.
- Se un esterno amplifier is used, ensure the remote turn-on wire (Blue) is connected and the amplificatore riceve energia.
7.3 Radio Not Turning Off with Ignition
- Verify the 12V accessory (Red) wire is connected to a switched power source that turns off with the vehicle's ignition.
7.4 Problemi generali
- Double-check all wiring connections for looseness or incorrect pairing.
- Consult the aftermarket radio's manual for specific troubleshooting steps.
- For further assistance, contact Metra tech support.
8. Garanzia e supporto
8.1 Informazioni sulla garanzia
The Metra 70-9003 Radio Wiring Harness comes with a 1-year limited warranty. Please retain your proof of purchase for all warranty claims.
8.2 Supporto tecnico
Metra provides technical support 7 days a week for installation assistance. For contact information, please refer to the product packaging or visit Metra's official websito.
