Hi there, I just bought a diesel Ford shorter bus, its been running fine but I think I left the lights on for 2 days and now it wont start or turn over. I got jumper cables but I can't seem to find where my batteries are located to give it a jump and dont want to mess anything up. Please help. Pictures?

 

Check along the frame rail, generally I have seen them on the passenger side.

 

You can connect the booster cable to the main battery positive terminal feed at the battery junction box on the passenger side of the engine compartment, and the ground strap by the cowl. As already mentioned above, your batteries are contained inside battery boxes bolted to passenger side framerail under the vehicle.