e450 7.3 02 key ignition *killer* switch ?

[KGZ91]

Hi guys bus been sitting for almost 2 years same as i left it back then.Got plenty of time to play
want to fix that starting issue with no crank with key
i bypassed it with straight wiring to starter and battery.
Assuming Neutral safety switch is good,relay gets power,all fuses intact.
What else they add in circuit i dont know compare to regular vehicle.

[schoolbuscraig]

Depending on what state or the options on the bus you have. It could have been built with a starter interrupt circuit. It is designed to not let the engine crank if the back door is locked.
I might be able to get you a wiring diagram is you have a Thomas or Bluebird.
I need the last 7 digits of then VIN or body number for a Bluebird

[KGZ91]

SOrry for late respond,i dont usually expect people to respond so didnt checked this forum,here's vin 1FDXE45F62HA11122 ,i believe body is bluebird

[KGZ91]

changed starter relay,all fuses good. , where do they hide that relay or whatever switch. all wirings off bus compartment removed at least i think so