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How do I hook up the sw control buttons to this unit, I really dont need all the functions I would be happy with just volume up/down.. it only has 2 wires a sw ground and sw key.. I think I know the yellow from the car jack is ground but does it go to the units sw ground or just ground it to the vechicle and the red & green are are for the controls... Im sure i cant just hook the red and green to the "sw key" or do one of the red/green wires go into the "sw ground" on the unit.. If i can only use one wire to the "sw key" is there one that will allow the volume up/down to work.. The unit is suppose to "learn" the buttons without needing a interface....
Last edited by Richiee85; Jan 23, 2016 at 10:07 PM.
