Just rebuilt the engine in this tractor and cannot get the engine to start. Primed the fuel system per the wsm and engine turns over fine. tested the power to the glow plugs and no power turning the ignition switch. removed and tested the relay and its working fine when bench testing. There is power applied to the relay but its not switching when its installed in the tractor. Is there supposed to be a dash light on this model tractor? if so its not coming on. I have been using the schematic in the wsm. any thoughts what may be not working.