Oil sensor and/or oil sensor module test?

The oil present switch in the engine is basically it just an on/off switch. When testing it read as an open circuit when correct amount oil present and zero or nearly zero when the oil is too low. Other words it like turning on an light switch on if too low oil is present.
To test the sensor module it works or not. With engine running you simply ground the lead the goes to oil pesent switch it should kill the engine if working. If not able to start with switch disconnected from sensor module disconnect the module if it then starts it is the sensor module.
 
My experience with these Honda style systems it is usually the oil present switch in the engine.

Basically that it.
 
I do have a little info module if it is faithful reproduction of the Honda sensor module. With a meter with a diode check function, you should about 1.200 reading with the positive lead on the wire that goes to kill switch and the negative lead on the wire that goes to oil level switch. When reversed "OL". Of course this with module leads disconnected from the circuit. OR at least that how the Honda sensor module here is reading.
 
From what I gather is the module is simply a double diode setup with them in series which would the voltage drop I got. Most silicon diodes reads around .7 vdc drop and two of them in series would around 1.4 vdc drop but these readings can vary +-10%.