oil pressure gauage

does anyone know the best way to check if my oiol pressure gauge is working? is there a fuse i can look at or what cuz when i was driving yesterday my gauge dropped to 0 pressure and i pulled over and ive got enough oil and my oil pan bolt is on tight so im guessing it's the gauge i just need to know a way to check if thats the problem, thanks

Sometimes the wire falls off the sender. There are two senders by the oil filter. The forward one is the idiot light, the rearward one is the guage. The one for the guage has a really odd POS connection on it, its very common for that to fall off.

yeah mine fell off once...somehow got caught in my timing belt and got sucked up....the wire was laying on the top of the motor lol...man did that make a very scary noise. i have an autometer now anyway so it's all good