Just wondering if the black plug that came out the back of the kenwood unit is connected to two skinny plugs futher into the vehicles harness. If so these two plugs are ISO plugs, which means to go to another head unit you just need a harness to go from these ISO plugs to the new head unit. In most casses this harness comes with a new head unit, although when I bought my Eclipse one it didn't, I had to buy it seperately.