The 2011 Subaru WRX remains one of the most iconic sport sedans of all time. It is a high-performance vehicle with exceptional features that guarantee an exhilarating ride. One of these features is the audio system. However, the audio system is only as good as the wiring behind it. In this guide, we will provide a complete overview of the 2011 Subaru WRX radio wiring diagram, including tables and a FAQ section.
What is a Radio Wiring Diagram?
A radio wiring diagram is a visual representation of the electrical connections between different audio components in a vehicle. It shows how the audio system is wired, from the power source to the speakers. Radio wiring diagrams are essential when installing new audio equipment, troubleshooting audio problems, or upgrading the audio system in a vehicle.
Why do you need a Radio Wiring Diagram?
A radio wiring diagram is necessary when installing a new audio system in a vehicle. It allows you to identify the wiring connections for the head unit, speakers, and amplifier, ensuring that all components are properly wired. Additionally, when troubleshooting audio problems, a radio wiring diagram can help you identify any issues with the wiring that may be causing the problem. Finally, upgrading the audio system in your vehicle requires a wiring diagram to ensure that all new components are wired correctly and work together seamlessly.
2011 Subaru WRX Radio Wiring Diagram
The 2011 Subaru WRX radio wiring diagram shows the connections between the head unit, amplifier, speaker, and antenna. The diagram provides color codes for each wire, making it easy to identify the correct wire during installation or troubleshooting. Below is a table summarizing the 2011 Subaru WRX radio wiring diagram.
| Wire | Color | Function |
|---|---|---|
| Red | Accessory | Power from ignition switch |
| Yellow | Battery | Constant Power |
| Black | Ground | Ground for head unit and amp |
| Green | Speaker | Left front speaker (+) |
| Green/Black | Speaker | Left front speaker (-) |
| Purple | Speaker | Right front speaker (+) |
| Purple/Black | Speaker | Right front speaker (-) |
| White | Speaker | Left rear speaker (+) |
| White/Black | Speaker | Left rear speaker (-) |
| Gray | Speaker | Right rear speaker (+) |
| Gray/Black | Speaker | Right rear speaker (-) |
| Blue | Antenna | Power for amplifier or antenna |
Head Unit Connections
The head unit is the central component of the audio system. It is responsible for processing the audio signal and sending it to the speakers. The head unit connects to the vehicle’s electrical system via a wiring harness. The 2011 Subaru WRX radio wiring diagram shows the following connections for the head unit:
- Red wire connects to the ignition switch, providing power when the key is turned to ACC or ON
- Yellow wire connects to the battery, providing constant power to the head unit
- Black wire connects to the ground, completing the circuit and providing a path for electrical current to return to the battery
- Blue wire connects to the power antenna or amplifier, providing power to the antenna or amplifier when the head unit is turned on
Speaker Connections
Speakers are responsible for converting the electrical signal from the head unit into sound waves. The 2011 Subaru WRX radio wiring diagram shows the following connections for the speakers:
- Green wire goes to the positive terminal of the left front speaker
- Green/Black wire goes to the negative terminal of the left front speaker
- Purple wire goes to the positive terminal of the right front speaker
- Purple/Black wire goes to the negative terminal of the right front speaker
- White wire goes to the positive terminal of the left rear speaker
- White/Black wire goes to the negative terminal of the left rear speaker
- Gray wire goes to the positive terminal of the right rear speaker
- Gray/Black wire goes to the negative terminal of the right rear speaker
Amplifier Connections
An amplifier is an optional component that boosts the audio signal before sending it to the speakers. The 2011 Subaru WRX radio wiring diagram shows the following connections for the amplifier:
- Blue wire goes to the power antenna or amplifier, providing power to the antenna or amplifier when the head unit is turned on
- Black wire connects to the ground, completing the circuit and providing a path for electrical current to return to the battery
FAQ
How do I install a new head unit in my 2011 Subaru WRX?
To install a new head unit in your 2011 Subaru WRX, you will need the following tools:
- Wire crimpers and connectors
- Screwdrivers
- Socket wrenches
- Trim removal tools
Here are the steps to follow:
- Disconnect the negative battery cable to prevent electrical shock or damage to the audio components.
- Remove the trim pieces from the dashboard and center console to access the factory head unit.
- Disconnect the wiring harness and antenna from the factory head unit.
- Connect the wiring harness and antenna to the new head unit.
- Install the new head unit into the dashboard opening, securing it with screws or brackets.
- Reattach the trim pieces to the dashboard and center console.
- Reconnect the negative battery cable.
- Test the new head unit to ensure it is working correctly.
Can I upgrade the speakers in my 2011 Subaru WRX?
Yes, you can upgrade the speakers in your 2011 Subaru WRX to improve the audio quality. To do so, you will need to follow these steps:
- Remove the factory speakers from the vehicle.
- Disconnect the wiring harness from the factory speakers.
- Connect the wiring harness to the new speakers.
- Install the new speakers into the factory mounting locations.
- Test the new speakers to ensure they are working correctly.
What is the purpose of an amplifier in a car audio system?
The purpose of an amplifier is to boost the audio signal before sending it to the speakers. By increasing the power of the audio signal, an amplifier can provide better sound quality and volume. Additionally, an amplifier can compensate for losses in the audio signal caused by long speaker wires or other electrical resistance in the audio system.
How do I troubleshoot audio problems in my 2011 Subaru WRX?
If you are experiencing audio problems in your 2011 Subaru WRX, there are several steps you can take to troubleshoot the issue:
- Check the audio settings on the head unit to ensure they are properly configured.
- Check the wiring connections for loose or damaged wires.
- Test the speakers individually to ensure they are working correctly.
- Check the amplifier (if installed) to ensure it is receiving power and functioning correctly.
- Check the fuses for the audio system to ensure they are not blown.
If none of these steps resolve the issue, you may need to consult a professional audio technician for further assistance.
Conclusion
The 2011 Subaru WRX radio wiring diagram is an essential tool for anyone installing or upgrading an audio system in the vehicle. It provides a detailed guide to the wiring connections for the head unit, speakers, and amplifier, making installation and troubleshooting easier. This guide, along with the tables and FAQs, should give you a complete understanding of the 2011 Subaru WRX radio wiring diagram and all its components.
