I found water in my trunk by fuse box and wires was under water what do i need to dol

What is your question?

1st my car battery cable was disconnected if not electrical components go crazy now i have no brake or tail reverse lights no radio gas lid gas gauge navigation center dont work

What makes this problem better or worse?

I keep losing things like components in back seat nothing is working

How long has your 2002 Lexus LS430 had this problem?

Few weeks