The SKREEM communicates with the CLPSSM to tell it to sound the siren.
( the siren has only 3 wires, a 12v supply, a ground and a signal wire that tells it when to call mama. )
Where did you find a 2014 Crossfire, that would command quite a price if you decided to sell




Funny thing is that fuse #9 is also listed in the wiring section as the source for the dome and trunk lights, as well as a B+ supply to the BCM :



I "think" that may have something to do with supplying power for the CAN B bus, which is used for BCM / CLPSSM communication, which then tells the siren to scream.
O what complicated minds these German engineers had.