gents, I've installed aftermarket radio Alpine ute92bt and it has additional three wires for steering control. 1st wire is REMO1 2nd wire is REMO2 3rd wire is SWRC G. OUT I connected remo 1 and 2 to appropriate pins and the 3rd black ground wire was connected to all other ground harness. all is working, till I turn the lights ON. when the buttons on steering wheel become illuminated, their resistance is changing therefore no response for illuminated buttons. interesting that the volume buttons remain working but UP DOWN MODE dies. I checked the pinout for G78 socket and couldn't find any grounding pin which is concerned to the steering control. pls advice how to resolve this issue
