Hi, is there an online site where I can get step by step (like the old motors manuals of the bygone era) where I can remove the radio on a 2002 Hyundai XG350. Want to replace the unit with a good aftermarket Sony. Info is good on installation with the new radio but need the wiring diagraghm of the existing hyundai speaker and power wiring and what and how to remove the old radio. Thanks in advance