trying to go from jvc kd-s550 to a kenwood kmr555u. there are three red wires on the jvc and a rd black and yellow wires on the kenwood. red is hot, or power, black ground yellow to turn off with the key switch, but the two red wires on the old jvc going to two different places are messing me up because there is constant power to both reds on the old jvc. i could figure it out if i just had access to the wire diagram for the old jvc, i hope i didn't confuse you more than me thank you, Dan