So recently my car (2002 civic si) had been siting for awhile and when I went to start it I wasn’t getting any power whatsoever. So I replaced the battery and accidentally reversed the positive and negative so it blew the 80a fuse, I got a new one and it also blew the second I put it on. Any suggestions?

 

Do you still have the positive and negative terminals reversed ??? If not, your "accident" may be far more damaging than you anticipated.