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ref means that it is exactly 10 volts because it is a digital circuit.
The radio supplies 10 v ref to the SWC. The buttons are connected from the 10v ref to a resistor that sends a voltage to the radio. Something like (made up values): tune up=8v, tune down=7v,vol up=6v,vol down = 5v.
The SWC gets the 10v ref on the blk/wht on pin 14 ON THE RADIO.
The colors on the diagram continue to the steering wheel.
I don't know how your adapter is wired, talk to the manufacturer. My guess is that it gets accessory voltage and makes it 10v ref because the radio doesn't have that pin.
As far as I can see you just connect 2 wires from the module to 2 wires on the switch an the 12v and ground to the car, the plug the phono jack into the other adapter.
Crutchfield.com provides FREE help and wiring diagrams.
Here is the instructions for a PAC SWI-ADAPT module from the crutchfield site, I guess most others are similar.
Thanks for the quick response here's a picture of what I was trying to use. I've seen others use this but somehow I can't get it to work. I did speak to the manufacturer about it and we did all kinds of troubleshooting. But something's not right.
And the head unit I am using is this Panasonic.
So the head unit is supposed to be supplying 10 bolts to pin with the white black wire which supplies the voltage to the switches in the steering wheel and then they are sent to the adapter to make the appropriate changes on the stereo something like that right? Thanks again I'll see if I can figure this out.
I figured it out, after you told me that the HU is supplying the 10 volts to the white black wire. I went back and looked at the instructions for the black box and I missed a section where it said to hook the red wire from the box to switched 12 volts, Plus connect that to the white black wire (that gets the 10 volts from the HU). I never added the wire from the switched 12 volts to that PIN. I'm a dummy.
