525i lost most interior powers

Can anyone tell me why in a 525i, '91: radio, powered seats, powered windows are all dead?
Fuses are ok and engine runs ok, A/C works well.

I researched this forum and found someone who had the same problem. The solution was usefull. The solution was the fuse (80 amp) located next to the battery that was cracked. It was inside a plastic box 2''x5'' next to the battery.