Introduction
This manual provides detailed instructions for the installation and use of the G-RZ-OP55 16-pin wiring harness and CANbus decoder. This product is designed to facilitate the integration of an aftermarket Android CD radio into specific Opel vehicle models, ensuring proper communication between the new head unit and the vehicle's electronic systems, including power, ignition, illumination, and steering wheel controls.
Please read this manual thoroughly before installation to ensure correct setup and optimal performance.
Vehicle Compatibility
The G-RZ-OP55 CANbus decoder and harness adapter is compatible with the following Opel vehicle models and years, specifically when replacing the original CD unit:
- Opel Vectra C: 2004-2007
- Opel Zafira B: 2006-2010
- Opel Astra H: 2006-2014
- Opel Corsa D: 2006-2014
- Opel Tigra: 2004-2010
- Opel Antara: 2008-2013
Ensure your vehicle's make, model, and year match the listed compatibility to guarantee proper function.
Package Contents
Verify that all components are present before beginning installation:
- 1x 16-Pin Wiring Harness Adapter
- 1x G-RZ-OP55 CANbus Decoder Module
- 1x Antenna Adapter
- Auxiliary cables (RCA, USB, etc., as pictured)

Installation Guide
Safety First: Before starting any electrical work on your vehicle, disconnect the negative terminal of your car battery to prevent short circuits and electrical damage.
Prepare the Vehicle: Carefully remove your vehicle's existing head unit from the dashboard. Refer to your vehicle's service manual for specific instructions on how to safely remove trim panels and the radio.
Identify Connectors: Locate the vehicle's factory wiring harness connector. This is where the new adapter will connect.

Figure 2: The 16-pin connector that interfaces with the vehicle's wiring. Connect CANbus Decoder: Connect the G-RZ-OP55 CANbus decoder module to the designated connectors on the wiring harness. Ensure a firm connection.

Figure 3: The G-RZ-OP55 CANbus Decoder module. Connect to Aftermarket Radio: Connect the 16-pin connector of the harness adapter to the corresponding port on your new Android CD radio. Also, connect any auxiliary cables such as RCA for audio/video output/input, USB extension cables, and the antenna adapter.

Figure 4: Connections for the aftermarket Android head unit. Connect to Vehicle: Plug the vehicle-specific end of the wiring harness into your car's factory wiring connector. Ensure all connections are secure and properly seated.

Figure 5: The complete harness and decoder assembly. Initial Test: Before fully reassembling the dashboard, reconnect the car battery. Turn on the ignition and test the basic functions of your new Android CD radio. Verify power, sound, steering wheel controls (if applicable and configured), and other integrated features.
Final Assembly: Once all functions are confirmed, carefully route the cables to avoid pinching or interference, and reassemble the dashboard components.
Operation
The G-RZ-OP55 CANbus decoder operates automatically once correctly installed. Its primary function is to translate the vehicle's CANbus data into signals that your aftermarket Android CD radio can understand and utilize. This includes:
- Ignition (ACC) Signal: Provides power to the radio when the ignition is on.
- Illumination Signal: Dims the radio's display when headlights are turned on.
- Reverse Gear Signal: Activates the rearview camera input on the radio when the vehicle is in reverse.
- Speed Pulse Signal: Provides vehicle speed data, often used for navigation systems.
- Steering Wheel Control (SWC) Interface: Allows the vehicle's factory steering wheel buttons to control the aftermarket radio (functionality may depend on the specific Android radio and its configuration).
There are no user-adjustable settings directly on the CANbus decoder module itself. All operational adjustments, such as mapping steering wheel controls, are typically performed through the settings menu of your Android CD radio.
Maintenance
The G-RZ-OP55 CANbus decoder and wiring harness are designed to be maintenance-free once installed. No periodic servicing or adjustments are required.
- Ensure all connections remain secure and free from moisture or excessive vibration.
- Avoid exposing the module or wiring to extreme temperatures or corrosive chemicals.
- Do not attempt to open or modify the CANbus decoder module, as this may void any potential warranty and could damage the device or your vehicle's electronics.
Troubleshooting
If you encounter issues after installation, consider the following troubleshooting steps:
- No Power to Radio:
- Check all wiring connections, especially the main 16-pin connector and the vehicle's power supply.
- Ensure the car battery is properly reconnected and charged.
- Verify vehicle fuses related to the radio and accessory power.
- No Sound:
- Check speaker wire connections.
- Ensure the radio's volume is up and not muted.
- Verify the radio's audio output settings.
- Steering Wheel Controls Not Working:
- Confirm your Android radio supports external steering wheel controls and that the SWC wires are correctly connected.
- Access your Android radio's settings menu to configure or "learn" the steering wheel buttons. Refer to your radio's manual for specific instructions.
- Ensure the CANbus decoder is properly connected and functioning.
- CANbus Error Messages on Vehicle Display:
- Double-check all connections to the CANbus decoder and vehicle harness. A loose connection can cause communication errors.
- Ensure the G-RZ-OP55 model is indeed compatible with your exact vehicle model and year.
- Intermittent Functionality:
- Loose connections are a common cause. Re-seat all connectors firmly.
- Check for any pinched or damaged wires.
If problems persist after following these steps, it is recommended to consult with a professional car audio installer or contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Product Type | 16 Pin Wiring Harness & CANbus Decoder |
| Model Number | G-RZ-OP55 |
| Compatibility | Opel Vectra C (04-07), Zafira B (06-10), Astra H (06-14), Corsa D (06-14), Tigra (04-10), Antara (08-13) |
| Connector Type | 16-Pin (to Android Radio), Vehicle-Specific (to Opel), RCA, USB, Antenna |
| Function | CANbus data translation for aftermarket Android CD radios (ACC, Illumination, Reverse, Speed Pulse, SWC) |
| Package Dimensions (L x W x H) | 10 cm x 10 cm x 10 cm |
| Package Weight | 0.18 kg |
User Tips
- Professional Installation Recommended: Due to the complexity of vehicle wiring and CANbus systems, professional installation by a qualified car audio technician is highly recommended to ensure correct setup and avoid potential damage to your vehicle or the product.
- Double-Check Compatibility: Always verify the exact model and year of your vehicle against the product's compatibility list before purchase and installation.
- Consult Radio Manual: For specific settings related to steering wheel controls or other features, refer to the instruction manual provided with your aftermarket Android CD radio.
Warranty and Support
For any questions regarding installation, troubleshooting, or warranty claims, please contact the seller or the manufacturer directly. Keep your purchase receipt as proof of purchase.





