Oil pressure gauge not working

[Reg10]

Hello my gauge is not working since I have had the car
What do I need to check please as do t want to buy a switch and it not that
Any ideas please
I have a spare gauge so could swap but thought I ask hear first thanks

[Mr Raider]

Check wiring and connections first of all, oe oil pressure gauges can be tempremental and not accurate. Wiring is on the front of the block.