Why wont your Infiniti Q45 turn over?

Mine was the starter on 1996 I30. I downloaded the schematic diagrams for the electrical system. I took out fuse #17 (10 Amp) which basically shut down the anti-theft (start) and it still didn't start. After checking that fuse #33 (7.5 Amp) was good, I replaced the starter and it's working fine. The only other thing it could be is the inhibitor switch (Park or Neutral switch) so try both positions and if it doesn't start in either Park or Neutral, it's probably the starter unless you have a stick instead of an automatic. In stick shifts, there is another switch linked to the clutch...that can stop it from starting.