Am the proud owner of a brand new defender 110 in New Zealand. Can anyone point me in the right direction for an electrical wiring diagram?:)

Hi Landy Zone Members I'm new here, seeking help with a problem with a 2003 Td4 Freelander. My Freelander starts first time and runs well until it gets up to temperature after about ten minutes (its winter time in New Zealand). Then, almost like flicking a switch, it starts billowing clouds...