For those who have an Interscope sound system with an amplifier, in order to have the sound, you need to connect the 2 blue wires with label AMP and AMP CON

AMP CON is located on same harness as the microphone.

On the video, you could see that I removed all extra wires, I did not need, to keep only the microphone and the AMP CON wires.

In my case, I connected:
1- The 3 ISO connectors (A, B and C) of the car to the Witson provided harness
2- the Antenna wire of the car to the antenna connecter on the Witson autoradio
3- Plug the Canbus card on the dedicated pin

At this stage, you should be able to start the autoradio but with no sound and the steering wheel buttons do not work.

4- Plug the little connector coming out from the canbus connector to the dedicated pin the autoradio to have the steering wheel buttons work
5- Connect the blue wires AMP and AMP con together and plug the AMP CON connector on the dedicated pin on Witson autoradio.

You might have 2 blue wires with AMP label coming from the ISO connectors. Try both.

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