Low Oil Pressure Warning Light Does Not Light

Just noticed recently that this warning light isn't coming on. Service manual says to check 4 things: 1) Gauge fuse is blown, 2) bulb is burned out, 3)Low oil pressure warning switch is faulty, 4) wiring or ground faulty.

I want to check-out my thinking around these 4 things. First, if the gauge fuse is blown, wouldn't other things (like the brake warning light) also not work? Second, if a bulb is burned out, does each warning light have it's own bulb? Is accessing that something that should only be done by a very experienced person? Third, for the low oil pressure warning switch, it says to Disconnect the connector from the pressure switch and ground the connector on the wire harness side. I am imagining that means to take the wire off the switch and then connect it to a metal part of the chassis. Is that correct?

Any other thoughts or suggestions on problem-solving this?


Thanks!

Zak