Oil Pressure Light Switch - Wiring?

[BadAssPerformance]

OK... one wire going to the oil pressure switch (for the light)... Guessing it is a ground switch then? Is it that simple? Looking to wire up an AutoMeter "Low Oil Pressure" Light... figured that might be a good idea after two oil pumps? :o

[supercrackerbox]

Should just be a grounded switch. I know Ray put the one in his Spirit with a cheap switch and an LED from the parts store.

Are you running a seperate switch for this, or getting one of the dual switches that will run both the gauge and a warning light?