first off thank you for your reply.
I mean the the regulator / cut off valve on the diesel high pressure pump. It has 12v from from pin 8 of the black plug in engine bay fuse box and 3.5v from ECU brown plug pin M4. I think this is supposed to be a negative but I can't understand why it has 2 different voltage
I mean the the regulator / cut off valve on the diesel high pressure pump. It has 12v from from pin 8 of the black plug in engine bay fuse box and 3.5v from ECU brown plug pin M4. I think this is supposed to be a negative but I can't understand why it has 2 different voltage