2003 5.9 No Start
 

I Am looking for some help on my 5.9.
I bought just bought this truck in not running condition, it spins over fine and will try to start on either.
It will not pull up any P codes and will not even display the P Code or Done but it does display C-codes AA. fuel gauge and Alt gauge are not registering and not turning on the lift pump relay ( pump works fine if I put power to it). I have replaced Batteries, instrument cluster, PCM and fuse box, cleaned grounds.
I plugged a scanner into it and it does read said there are no codes.
any ideas?

sounds like the ecm is locked up.

Thank you I am going to try a new one the end of next week.
That about all I have left.