1. Introduction
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. Contenu du colis
- Metra 70-9003 Wire Harness
- Manuel d'instructions
Image: The Metra 70-9003 Radio Wiring Harness as it appears in its retail packaging, showing the product label and part number.
3. Spécifications
| Marque | Métra |
| Numéro de modèle | 70-9003 |
| Matériel | Chlorure de polyvinyle (PVC), polyéthylène (PE) |
| Dimensions de l'article (L x l x H) | 7.75 x 4.5 x 2 pouces |
| Poids de l'article | 0.8 onces (22.68 g) |
| Type de connecteur | Brancher |
| Utilisations recommandées | Remplacement de la radio |
| Diamètre du fil | 18 mils |
| Compatibilité | Audi/BMW/VW 2002-Up (Confirm with Metra Vehicle Fit Guide) |
4. Instructions d'installation
4.1 Généralitésview
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 Avant de commencer
- 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.
- Débranchez la borne négative de la batterie du véhicule pour éviter les courts-circuits électriques pendant l'installation.
- Gather necessary tools, which may include wire strippers, crimpers, electrical tape, and a multimeter.
4.3 Connexions de câblage
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:
- Jaune: Puissance constante de 12 V
- Rouge: 12V Accessory Power (Switched)
- Noir: Sol
- Bleu: Antenne de puissance / AmpAllumage à distance de l'amplificateur
- Orange: Éclairage
- Fils de haut-parleur : (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 Connexion au véhicule
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
- Rebranchez la borne négative de la batterie du véhicule.
- Turn on the vehicle and test the aftermarket radio's functions, including power, audio output (all speakers), balance, fade, and illumination.
- Si toutes les fonctions fonctionnent correctement, remontez soigneusement les composants du tableau de bord.
5. Mode d'emploi
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. Entretien
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. Dépannage
7.1 No Power to Radio
- Vérifiez la boîte à fusibles du véhicule pour détecter d'éventuels fusibles grillés liés à la radio ou à l'alimentation des accessoires.
- Verify the 12V constant (Yellow) and 12V accessory (Red) wires are correctly connected and receiving power using a multimeter.
- Assurez-vous que la batterie du véhicule est complètement chargée et correctement connectée.
7.2 Aucun son ne sort des haut-parleurs
- 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.
- Si un externe amplifier is used, ensure the remote turn-on wire (Blue) is connected and the amplifier reçoit de l'énergie.
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 Questions générales
- 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. Garantie et assistance
8.1 Informations sur la garantie
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 Assistance technique
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 website.
