The switch goes into the left side of the oil tank it has 2 wires oe is ground and one is signal .when the tank is full the switch should be open .
When the oil level drops below the swith the switch closesthe circuit to ground . so I guess the float or contacts are stuck . you can take it out and see if you can fix it . Or you can buy a new one and replace it . Now where can I find where it says the oil light signals anything but low oil . Maybeif you have an owners manuel you can read what they have to say I
only have the shop manuel ,and couldn't find any thing in there .That dealer should have been able to fix that in about ten min.