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

Originally Posted by Rok_Dr

Neat!

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

Cheers

Steve

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?