This guide will let you know where to find the Fuses in The Silo Mount Chiliad in Grand Theft Auto Online Criminal Enterprise Update.
The first one is directly outside the room where the main circuit board is.
The second one will be just right across the hallway in the room, right next to the red toolbox.
The third one is in the large room upstairs towards the end of this area, on top of the wooden box. Now the last fuse is just down the stairs to the right, there are a few boxes to destroy.
When you completely destroy them, you will find the fuse at the end of it.