1989 Ford Aerostar wont start please help?

Hello I have just bin giving a ford aerostar v6, it has no manuals no history no regerstration nothing apart from a reciet of $190 for a new fuel pump. The car will not start and stay running it sounds as if the starter is staying igauged then it cuts out but that is not all when I connect the earth lead to the battery, the car trys to start even with the keys in my hand. I have taken the starter off and checked if it is sezzed but every thing is really free even the solinoyed. I have no manual or any idea were the starter relay is or which one it might be, has any body got any idea's what may be wrong with it and how to sort it out please as iv bin told I have to have it moved in a week or its going to get scraped HELP? Also I have changed the distributer cap and arm plus put new plugs in it as well. Many thanks for reading Chris.