Central Junction Box Problem

[Buruquena]

My truck does not start but the starter cranks until I move the central junction Fuse Box (it wiggles freely right now). It seems the fuse box is corroded. Anybody have experience changing or fixing the Central Junction Fuse Box? Any tips of how should I do this repair?
Thanks in advance

[pennyman1]

Best advice is to get a manual with a wiring diagram and replace the fuse block one circuit at a time. Not a fun task, but necessary if you want it to run.