Introduction
The Alpine CDE 9870 is a popular car audio head unit that offers a range of features and functions to enhance your audio experience while driving. However, installing the Alpine CDE 9870 may seem daunting, especially when it comes to wiring the unit correctly.
This guide will provide you with a comprehensive wiring diagram for the Alpine CDE 9870, including explanations of each wire’s function and how to connect them to your vehicle’s wiring harness. You will also find frequently asked questions (FAQs) at the end of this article to help clear up any confusion you may have about the wiring process.
Wiring Diagram
Before we dive into the wiring diagram, it’s important to note that the Alpine CDE 9870 comes with a wire harness that needs to be connected to your vehicle’s wire harness. The wire harness should come with the Alpine CDE 9870, but if not, you can purchase one from the manufacturer or a third-party supplier.
Once you have the wire harness, you can begin wiring the Alpine CDE 9870. Refer to the following wiring diagram:
| Wire Color | Function | Connection |
|---|---|---|
| Yellow | Battery | Connect to positive (+) battery terminal |
| Red | Ignition | Connect to accessory or ignition wire of vehicle |
| Black | Ground | Connect to vehicle’s ground wire |
| Blue/White | Amplifier remote turn-on | Connect to amplifier’s remote turn-on lead |
| Orange/White | Illumination | Connect to vehicle’s illumination wire |
| Brown | Telephone mute | Connect to telephone system’s mute control wire |
| Green | Left front speaker (+) | Connect to left front speaker (+) wire of vehicle |
| Green/Black | Left front speaker (-) | Connect to left front speaker (-) wire of vehicle |
| Purple | Right front speaker (+) | Connect to right front speaker (+) wire of vehicle |
| Purple/Black | Right front speaker (-) | Connect to right front speaker (-) wire of vehicle |
| Gray | Left rear speaker (+) | Connect to left rear speaker (+) wire of vehicle |
| Gray/Black | Left rear speaker (-) | Connect to left rear speaker (-) wire of vehicle |
| White | Right rear speaker (+) | Connect to right rear speaker (+) wire of vehicle |
| White/Black | Right rear speaker (-) | Connect to right rear speaker (-) wire of vehicle |
Explanation of Wire Functions
Now that you have the wiring diagram, let’s take a closer look at each wire’s function:
The yellow wire is the battery wire and should be connected to the positive (+) battery terminal of the vehicle. This wire provides constant power to the head unit and ensures that all settings and configurations are saved even when the vehicle is turned off.
The red wire is the ignition wire and should be connected to the accessory or ignition wire of the vehicle. This wire provides power to the head unit when the vehicle’s ignition is turned on.
The black wire is the ground wire and should be connected to the vehicle’s ground wire. This wire ensures that the head unit has a proper ground connection, which is essential for proper functioning.
The blue/white wire is the amplifier remote turn-on wire and should be connected to the amplifier’s remote turn-on lead. This wire turns on the amplifier when the head unit is turned on.
The orange/white wire is the illumination wire and should be connected to the vehicle’s illumination wire. This wire controls the head unit’s backlight, which allows for easy viewing in low light conditions.
The brown wire is the telephone mute wire and should be connected to the telephone system’s mute control wire. This wire mutes the head unit when a call is incoming or when the vehicle’s hands-free system is in use.
The green, green/black, purple, and purple/black wires are the speaker wires and should be connected to the vehicle’s speaker wires according to their polarity. The green wire is for the left front speaker (+), the green/black wire is for the left front speaker (-), the purple wire is for the right front speaker (+), and the purple/black wire is for the right front speaker (-).
The gray, gray/black, white, and white/black wires are also speaker wires and should be connected to the vehicle’s rear speaker wires according to their polarity. The gray wire is for the left rear speaker (+), the gray/black wire is for the left rear speaker (-), the white wire is for the right rear speaker (+), and the white/black wire is for the right rear speaker (-).
FAQs
1. How do I know which wire is which on my vehicle’s wiring harness?
Typically, vehicle wiring harnesses are color-coded, which makes identifying each wire’s function easier. However, if you’re not sure which wire is which, you can use a multimeter to test each wire’s voltage and continuity. Alternatively, you can consult your vehicle’s owner manual or consult a professional installer for assistance.
2. Can I install the Alpine CDE 9870 without a wire harness?
While it is possible to install the Alpine CDE 9870 without a wire harness, it is not recommended. Using a wire harness ensures a proper connection between the head unit and the vehicle’s wiring, which is essential for proper functioning and prevents the risk of damage to either the head unit or the vehicle’s electrical system.
3. Can I use the Alpine CDE 9870 with my vehicle’s factory amplifier?
Yes, you can use the Alpine CDE 9870 with your vehicle’s factory amplifier. However, you will need to ensure that the amplifier’s remote turn-on lead is connected to the blue/white wire of the head unit’s wire harness.
4. What is the purpose of the orange/white wire?
The orange/white wire controls the head unit’s backlight, which allows for easy viewing in low light conditions. When the vehicle’s headlights are turned on, the head unit’s backlight will automatically dim to reduce eye strain.
5. Can I connect the Alpine CDE 9870 to my vehicle’s steering wheel controls?
Yes, you can connect the Alpine CDE 9870 to your vehicle’s steering wheel controls using an optional steering wheel control interface. The interface will vary depending on your vehicle’s make and model, so it’s important to consult with a professional installer or the manufacturer before purchasing an interface.
Conclusion
Installing the Alpine CDE 9870 can seem daunting, but with the right wiring diagram and knowledge of each wire’s function, the process can be relatively straightforward. Remember to always use a wire harness for proper connection and follow the installation instructions carefully. If you’re not confident in your installation skills, it’s always best to consult with a professional installer to ensure a safe and proper installation.
