I have a 1988 70hp evinrude that has had the vro system disconnected for at least 10 years and never had a problem but suddenly the beep ,beep, beep of the low oil alarm started going off. The oil tank has always been and is still half full of really old oil and it's never done this before. Did the previous owner miss something when they disconnected the system and it finally showed it's annoying little head? The vro pump oil line is capped off and the brown wire going down to the tank is disconnected. Do I need to remove more of the wiring?