but the whole point is to control it through the HU. what you want is the KCA-420i adapter. Cost on that unit is around $60. I sold a couple to CEGers for $70 (the lowest my boss would let me go) back when I was the audio hookup. The problem is that they are apparently still in high demand. heres one for $80 but ad shipping and your back over $90

http://thewholesalematrix.zoovy.com/product/ALPKCA420I?META=froogle-ALPKCA420I

2000 SVT Black/Tan #1633/2150 (a few mods) Alpine: CDA-9835, MRV-F540, MRD-M550 PG: TANTRUM-X 6.5 COMP all around. Some people wear Superman pajamas. Superman wears Chuck Norris pajamas. CEL currently: Off