You have a different problem unrelated to the SES jumper.

The SES jumper is in between the microphone and the TCU. Therefore, if you are missing an SES jumper, the problem is that no one can hear you. You are dealing with the opposite.

The problem in your car is that the audio output from the TCU is not making it to either your DSP amp or radio. There are a couple threads about this, but I cannot remember where I read them. I think that one person had to bridge the phone wiring to the radio.

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