Do you know how to connect steering wheel control on android car radio?

       
    How to connect and learn steering wheel control on Joying android head unit?

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First,could you find your factory steering wheel control wire?

If do not know which is your original steering wheel control wire, pls check this video about how to find out the steering wheel wire by Multimeter (usually the voltage is 5V): https://youtu.be/BBCTfdr3dEk

After finding out the Steering wheel wire:

If there are 2 steering wheel wires, then pls connect it to our key1 and key2 wire, GND wire must be connected like above picture shows.

If there is only 1 steering wheel wire in your car, then pls connect it to Key1 or key 2, GND wire must be connected

Then pls check this video to learn and set the steering wheel button:

 https://www.youtube.com/watch?v=jjrcGuB0D5s(Android 4.4.4)

 https://www.youtube.com/watch?v=xCPdAMy2aF4 (Android 5.1.1)