Remote CD Player (if equipped)
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
The remote CD player is known as the GFM on the network and diagnostic scan tool. It is always powered and uses CAN messages to turn the player power on/off and to control playback functions. Audio outputs are sent over hard-wired circuits to the ACM.