Here’s a quick guide to installing Android head unit with diagrams of all the wires. We’ll explain the meaning of each color on the main harness wires, as well as the secondary harness wires, antennas, and other accessories that can be connected to an Android radio with a screen.
Android head unit Main ISO Harness
The main ISO harness has color-coded cables to identify each cable’s function. This harness houses the power cables, speaker cables, and antenna power cables, as well as the power cable for the electric antenna or the power cable for connecting signal amplifiers for the radio antenna.
- Yellow: 12 volts constant. Must be connected directly to the fuse box.
- Red: Connects to the radio fuse in the fuse box and activates the radio when the car’s ignition switch is opened.
- Black: Ground wire, negative pole. (-)
- White: (+) and corresponds to the left front speaker.
- White with black line: (-) of the left front speaker.
- Gray: (+) of the right front speaker.
- Gray with black line: (-) of the right front speaker.
- Green: (+) of the left rear speaker.
- Green with black line: (-) of the left rear speaker.
- Purple: (+) of the right rear speaker.
- Purple with black line: (-) of the right rear speaker.
- Blue: Power supply for the motorized antenna and/or FM signal amplifier.
- Blue with a white line: Power supply for the signal to turn the audio amplifier on and off.
- Orange: Increase or decrease the radio’s illumination intensity depending on whether the car’s headlights are on or off.
- Key1 and Key2: Some cables come with the Key1 and Key2 labels. These are used to connect the steering wheel controls of the original radio to the Android radio, so that the buttons can be used to increase or decrease the volume, change songs, etc. After connecting, the keys must be properly learned from the radio’s settings for proper operation.
20 Pin Harness Audio and Video Inputs and Outputs
This Harness is composed of Audio and Video Inputs and Outputs.
- RCA Audio Out L and R: These are used to send the audio signal from the radio to an audio amplifier or a powered subwoofer.
- RCA AUX IN L and R: These are used to connect an auxiliary input that allows a device such as a cell phone to be connected via cable so that it can play audio through the radio.
- RCA CBVS IN: This is used to connect a video camera other than the backup camera. It can also be used to connect a front camera or a camera to monitor a truck’s tailgate, or for similar purposes.
- RCA Video OUT: This is used to send the video signal to a secondary display, allowing you to see what’s displayed on your radio’s screen.
- Green RCA SUB: This is the only green RCA cable that allows you to send the audio signal to an amplified subwoofer.
- Mic: This is a 3.5mm black cable used to connect an external microphone to your Android radio. This is handy for hands-free phone calls or for sending voice commands to your Android radio, for navigation apps, or other applications.
Rear Panel Android Head Unit
