1991 Honda Accord Radio Wiring Diagram

The 1991 Honda Accord is a classic car that still holds value in today’s market. One way to enhance the driving experience of this vehicle is by upgrading the radio system. However, before doing so, it is essential to have a proper understanding of the wiring diagram. In this article, we will provide a comprehensive guide to the radio wiring diagram of the 1991 Honda Accord.

Understanding the wiring diagram

Before installing a new radio, it is essential to understand the wiring diagram of the car’s radio system. The wiring diagram tells us which wires are responsible for which functions. It is a crucial aspect of accurate installation of a new radio system.

The 1991 Honda Accord radio wiring diagram consists of several wires with different colors that represent various functions. These wires include:

Wire Color Function
Yellow Battery
Black Ground
Red Ignition
Blue Power Antenna
White Front Left Speaker +
White/Black Front Left Speaker –
Gray Front Right Speaker +
Gray/Black Front Right Speaker –
Green Rear Left Speaker +
Green/Black Rear Left Speaker –
Purple Rear Right Speaker +
Purple/Black Rear Right Speaker –
Orange Illumination
Orange/White Dimmer

Each of these wires plays a crucial role in the functioning of the car’s radio system.


1. What is the purpose of the battery wire?

The yellow wire represents the battery input. It provides a constant supply of power to the radio, even when the car is turned off. It is responsible for retaining the memory of the radio and keeping the clock running.

2. Why is the ground wire necessary?

The black wire is the ground wire, and it plays a crucial role in the radio system. It provides a path for a complete circuit, ensuring that the radio functions correctly.

3. What is the function of the ignition wire?

The ignition wire is represented by the red wire. It plays a crucial role in powering the radio only when the key is turned on. When the key is turned off, the radio turns off as well.

4. What is the power antenna wire for?

The blue wire is responsible for powering the car’s power antenna. It provides a signal to the antenna, making it extend or retract as necessary.

5. Why do speaker wires come in pairs?

The speaker wires come in pairs to ensure that the positive and negative polarity of the signals is maintained. It is essential to connect the wires correctly to ensure that the speakers operate correctly.


Having a good understanding of the wiring diagram of the 1991 Honda Accord radio system is essential to ensure that the installation of a new radio is successful. This article has provided a comprehensive guide to the various wires and their functions that form the wiring diagram.

Remember, before beginning the installation process, be sure to read the installation manual carefully, and ensure that all connections are correctly made. Follow the wiring diagram closely to avoid damaging the car’s electrical system.