I have one Ducato diesel, I don't know is it with turbo or not. He don't have 4 heaters for cilinders, just one central in the air tube.I don't know anything about this heating system 
:bang: (how long is on when I'm starting engine). The relay box for control that heater is dead and indicator for heating engine not working. Also, I need electrical schema for it. Can somebody help me? Thanks in advance.:worship:
:bang: (how long is on when I'm starting engine). The relay box for control that heater is dead and indicator for heating engine not working. Also, I need electrical schema for it. Can somebody help me? Thanks in advance.:worship: