When testing a capacitor with an ohmmeter, what indicates a good capacitor?

A good capacitor, when tested with an ohmmeter, typically shows a very high resistance reading that eventually steadies. This is due to the capacitor charging through the ohmmeter's internal battery. At first, the resistance reading may begin low and, as the capacitor charges, the resistance increases. A steady high resistance indicates that the capacitor is functioning correctly and is not shorted.

If the ohmmeter reading is fluctuating wildly, it suggests that the capacitor may be leaky or damaged, as a good capacitor would charge up and establish a stable high resistance. A reading of zero would also imply a short circuit, meaning the capacitor is not functioning properly. A steady low resistance would indicate a shorted capacitor, which is not a sign of good health for a capacitor. Thus, the steadying of the reading at a very high resistance is the key indicator of a good capacitor.