How to Connect a Key Line (Brown Black) in Your Honda Amaze Car Audio System

Installing a car audio system can be a challenging task, especially when it comes to connecting the key line. The key line, often represented by a brown black wire, is an essential component of the audio system that needs to be connected correctly for the system to function optimally. This article will guide you on how to connect a key line in your Honda Amaze car audio system. We will walk you through the process step by step, ensuring that you can complete the task with ease and confidence.

Understanding the Key Line

The key line, also known as the remote wire, is a small wire that connects the car audio system to the car’s ignition. It’s typically brown-black and is responsible for turning the audio system on and off with the ignition. When the car is started, the key line sends a signal to the audio system to power up. Conversely, when the car is turned off, the key line signals the audio system to power down.

Locating the Key Line

In most car audio systems, the key line is part of the wiring harness that comes with the system. It’s usually labeled as ‘remote’ or ‘antenna control wire’. In some cases, it might be part of the car’s original wiring. If you’re having trouble locating the key line, refer to the manual that came with your audio system or consult with a professional.

Connecting the Key Line

Once you’ve located the key line, the next step is to connect it to the car’s ignition. Here’s how:

  • Disconnect the car battery to prevent any electrical accidents.
  • Locate the ignition wire in your Honda Amaze. This is usually a red wire that’s connected to the car’s ignition switch.
  • Using a wire stripper, strip about half an inch of insulation from both the key line and the ignition wire.
  • Twist the exposed ends of the key line and the ignition wire together.
  • Secure the connection with a wire nut or electrical tape.
  • Reconnect the car battery and test the audio system to ensure it powers on and off with the ignition.


Connecting the key line in your Honda Amaze car audio system is a straightforward process if you understand what you’re doing. However, if you’re not comfortable working with car wiring, it’s always best to consult with a professional. Remember, safety should always be your top priority when working with electrical systems.