Yes I wish I had a service manual... short of that I wonder if somebody familiar with this system could answer this... The oil lift pump works off crankcase pulse correct? So that single wire that goes to that pump that is for the warning system correct?? So if a diaphragm breaks or the pump stops working for any reason that will light up the oil light on the dash correct? Below that is the thing that distributes oil to each cylinder crankshaft cavity. If that thing were to fail seems to me there would be no warning is that correct??