Hello to all I am fully aware that there are some cleaver people on this site so I am hoping someone could help I am looking for information or a diagram would be great on the wiring system from a 12 volt car batt into the back of my van its all there its just it dont look right to me I think the last owners have done a bit of a cowboy job! could anyone help? the van in question is a 1990 Ford 160 it's an old Ambulance thats been converted.