Hi I've a p38 2.5 rangerover headlights staying on while engine running and no windows working

Hello.You need to check the wiring, also check the electronic control unit for corrosion and destruction. If you do not know-how, then contact the service. I check it with a spectrometer on this website. It analyzes the quality of metals a good thing when you buy a car. For example, you can find out the quantity and quality of alloys in your wiring.