On a 2001 Td4 I am trying to determine if the fuel pump in the tank has failed .
I removed the connection from the pump in the engine bay so I could hear the rear one running (or not ) .
No sound from the rear so I figured pump has failed - but just wondering would the pumps be interlinked in some way so that if one becomes disconnected the other doesn't work either ( maybe extra pressure would harm it ?).
Would appreciate hearing from anyone who has tried this method of finding the faulty pump .