2000 TD42t starting issue

[Bora5550]

After converting a 2000 wagon into a Ute cab,We have starting problems,winds over but won’t fire.I have a different steering wheel with airbag not connected at the minute.The immobiliser light only flashes once when switching back from accessories,the rear end of the harness has been removed from the drivers door light switch back.The engine was running before it was pulled apart.I have a grey four section plug under the dash on the drivers side that I can’t find a home yet( thinking back doors etc)All fuses and relays are fine.I have been told about the nats sensor wire on the pump but as the motor was running I’m thinking simple first.Any ideas or thoughts are appreciated.