did you buy the harnness? (a wire connect from your car to after market cd player) stock cd player doesn't need 1 so they dont' come with 1, and did u buy the frame? to direct fit your cd player to ur car? if u buy the frame, included in the frame, there should be instruction tell you how to take out ur current 1 and put in the new 1, and after that connect the wire on the harness to your cd player, then you done.