Hi there. I have a problem with my fuel pump. It runs fine with an external power source connected. But the cars own wiring will not deliver enough current to drive the pump, even though i measure 12,7V in the socket that connects to the pump. So my question is: how / where is the wiring harnes routed from the tank to the engine bay? I suspect chaffed wiring or corroded sockets somwhere along the way, but i dont know where to start looking.. D2 2003 td5..