What I can tell on page 7-37 in the service manual for the FCM the engine fuse block and the FCM are in two separate places. Also if you have an SRT-6 the FCM is in an different place than a N/A. The engine fuse block housing is located near the ECU housing near the battery next to the fill tube for the wiper fluid. Hope this helps. Please read post #4 from pizza guy on the communications from the FCM and the ECU.