TL;DR: I reconnected my OEM Audio unit and it is non-functional. The 5A fuse at F19 on the BCM for "Front Control Display / Interface Module" has blown twice. Radio (CD player box) and Display both have power in both key positions. The main unit makes noise when you plug it into the main...
By "Source" side I mean the radio source side or the "power OUT", side of the fuse. The power "IN" side of the fuse, which is timed, would be blank as if there was no fuse at all. My thinking is that the CAN bus or BCM would never know there was current being drawn, except for the sensor on the negative battery post.
In six years no one has been able to wire around that timer, Get a boombox before you burn something up.
The Bcm/Can-bus monitors the entire transit electrical system,.
The sensor on the battery clamp monitors battery temperature while charging, Agm do not like Heat.
Vehicle amperage draw is monitored on a cable near, and for, The alternator.