B-rad

I have measured the voltage at the fuse block and at several points on various wires. I believe the 2.4V is correct. I think these lines have something to do with the CAN-Bus System. I am hoping someone can point me to a specific location (fuse, wire, etc.) to tap into. I have already checked a bunch of locations. I would prefer not guessing anymore.

I am installing an add-on Sirius Radio to my 2011 Edge SE. I need a source of 12V that is switched with the ignition (or accessories). Does anyone know a source for switched voltage in the Edge? Most of the switched voltage is only 2.4V.