i have 4 zener diodes of same type which checks out in diode setting with small differences between them, but when measuring in ohms one is 23Mohm another one at 5Mohm and 2 OL. is these ok or only leaky?
they indeed where leaking when testing with 12v. is it safe for testing purpose to not put them back in since they only are for overvoltage protection?
What voltage rating are the zeners? A 12V zener will definitely be leaking at 12V for instance, but a 15V zener should be pretty high impedance.