You may not have to do anything to it. I would think, and I could be totally wrong, that it would depend on whether the sensor triggers and open circuit or a closed circuit to turn the light on when the oil level is too low or whether it's just a reference voltage kind of thing. 1 of 3 things is possible. Do nothing and see what it does. If it triggers the light, try jumpering the terminals and closing the circuit. If neither of those work, you would have to rig something to send a constant reference voltage to the system so it would think everything is normal. I'm not an electircal/sensor guru at all and I'm sure others will chime in with more definitive answers for you but hopefully some of this helps.