If its turning over ok then I'd check the fuel lift pump that primes the fuel system before the injector pump. When the ignition is switched on and before you crank the engine, you or somebody standing at the rear of the combine should hear the pump priming the fuel line and then stop when up to pressure. If there is no fuel or a leak downstream of the lift pump, then the pump should stay on. Of course it could be the wiring to the lift pump that has been chewed through.
I'm not familar with the 9500 but thats the first thing I would check taking into account what you have described above.
Laury.