1989 200h .p. yamaha This is a continuation of a unresolved problem.Specifically, the engine mounted oil tank is not getting any oil.The pump does not turn on when key switch is turned on.My volt meter shows 12 volts going to main tank sensor however no voltage is going to the pump when the key switch is turned on..When bypassed oil pump works. The float sensors in oil tank mounted on engine seems to function alarm goes off when oil level goes down and alarm resets when oil is added.Assuming wires are in good working order which appears to be the case ,is there a way of checking the oil injection module, the bypass switch does not work.This issue started on a intermittent basis but now is permenant.I have researched many threads unfortunately finding nothing specific to these symptoms of a 1989 200h.p. yamaha.Updated question do the wires that plug into the oil control unit assembly come out, from the box itself,it looks to the eye that there is a rubber type plug going in directly, however I dont want to pull them unless Im sure.Also while attempting to trouble shoot what does the term swb stand for? In dealing with floats and sensors.What would cause a drop in voltage from main tank sensor to pump?
