Hello guys, I bought a transit in 2007, with 101Ps diesel engine from an auction. The vehicle had been in the safe for a long time so the battery was empty. Now to my problem. In the vehicle was an 80Ah battery and when I looked under the driver’s seat another 80Ah battery was connected. Must say that I have no idea whether both were or must have been there. Just what I notice is that I have both batteries on it but also have to say that I have not know if both are ok, that vehicle only starts when I bridge it on the front over mass and the small red pins at the engine!! Now I have read on the internet about additional battery and switching relays ???? How should I proceed and test what???? Do my vehicle need two batteries??? Maybe my previous owner didn’t know that either??!! Please for help Thank you By the way, I have developed the driver’s seat is better. Greeting Marko