So…when I wanted to build the radio(jvc kds8r) I first connected the plugs, and pressed on power(the radio I still had inside hand) jo the radio ran perfectly…and then my colleague so “ey what goes off the radio shouldn’t go on at all” I then so “like why not “he then again “look” my colleague had the mass cable(black) inside hand that was not connected it hung from the s That’s why I didn’t think about it (wanted to make a quick move) and put the radio in.Days later I buy myself a Clarion drx6575rz, in which the same game.How can it be??Ah yes, I had this radio inside my hand … I connected the plug (Din) + , – , rem , yellow cable.I connected the cable to + with.The rem also normally.