Alpine Audio head unit with Steering Wheel control no adaptor required...

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Originally Posted by Rok_Dr

Neat!

Could you expand on why the resistor is needed to get the steering wheel controls working?

Cheers

Steve

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The D2 steering wheel control simply has different resistances for each switch depressed ie: Vol+, Vol-, Mode etc.
The IDE178BT (HU) can be programmed to each steering wheel control switch resistance to perform whatever function. I managed to program all buttons but could not the Vol-.
Referring the rave circuit diagram I noted the Vol- button has no resistor which the HU didnt like.
So I wired a 1K ohm resistor in the common in series with all switches re-programmed the HU.

And the green illumination matches the D2 dash light too.
Regards

Did you get the steering wheel controls to work Phil?