How to test the oil pressure in my 1994 audi cabriolet?

I'm pretty sure that my oil switch is malfunctioning again. I just don't know how to test the oil pressure. How do I do it?How to test the oil pressure in my 1994 audi cabriolet?You are going to need a mechanical oil pressure gauge. You can buy one pretty cheap at any parts store or speed shop. remove your oil pressure sending unit/switch, install the correct adaptor for the mechanical gauge and connect the small clear hose supplied in the kit from the adaptor to the gauge. Start your car and watch the gauge. then compare that reading to what your oil pressure gauge in the car said with the original switch in.

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