yep i have only just done this recently on my 1997 camry you have to buy two harnesses: 1) which has an adaption to the car and out to a universal fitting 2) with the universal fitting to the aftermarket head unit. (Although sometimes on one of the harnesses the power constant and ignition power cable are switched, i got told, but didnt happen to me) Each cost about 20$ from repco or supercheap auto, a lot easier than cutting and re-soldering which is what a mate had to do because he rushed into it.