Turn key and it runs it's normal cycle. Once u push in the clutch and go to start it dose nothing won't even click. The change oil just came on the overhead so my ? Is how sensitive are they to that if the oil needs to be changed will it not start? It's an 07.5 6.7l

 

I read the computer can shut the starter down if it detects something it dosnt like. IOD sensor I've Hurd but can't find a fuse diagram. Jumped starter it cranks when jumped. Have 12.6 on both batters. Don't know wat they are under a load cuz it's just me but I'm not sure wats going on

 

Unplugged the IOD on the fuse box for over a minute plugged back in and wam fired up.

 

Anyone know what causes this to occure

 

possibly the clutch safety switch? just a guess at this point