Hi, One suggestion I have for anyone with XM or Sony info systems problems is to seek out a professional at a car audio installation shop.
They know not only how to get your Sony removed but to fix any XM Tuner issue. There are at least two in Fredericksburg, VA.
PS. I moved your post out of that other thread on connecting a phono to the Sony radio into it's own thread. When asking a new question it should always be given it's own thread for best results.
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad