The wiring diagram for a non-DSP signal shows all four wires (audio + and -, Mute, and ON) going into the tuner module.

The DSP wiring diagram shows them going into the DSP (as they did, with the Mute wire showing and testing in both places).

Se we lengthened the + and - and ON wires and inserted them into the correct pins on the tuner module, with the MUTE wire already being present (your pin info was confirmed in the non DSP wiring diagrams on bmwtechinfo.com)

But the tuner module is not passing ANY audio. I am confident it's getting the right signal. Even if it WERE a balanced audio thing, we'd at least get bad-sounding audio.

I've been told that BT installs on non-DSP cars have not required any re-coding.

We get the car back tomorrow AM and if I can't figure this out I have to re-install all those stepdowns and lose the SQ benefits of the straight balanced interface we did. Argh.

We will have a couple of days to work with it, as we are installing an Icelink and possibly a Passport SRX.

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musicar northwest, portland oregon

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