How to find factory car steering wheel control wire and connect it

Do you know which is factory car steering wheel control wire.

If not,There is a video about how to find it.

Note: Generally speaking ,the voltage is 5V

If your have two swc wires ,please connect it to our unit key1 and key2 wire, and GND wire must be connected like below picture shows.

If your car has only 1 steering wheel wire,please connect it to Key1 or key 2, GND wire must be connected.

Please kindly check the video about how to learn and set the steering wheel keys

Android 4.4.4

 Android 5.1.1

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