[LazyPup]

If your diaphram switch has three wires that is either a dual water level switch, a normal and high water level.. or the third wire will be either green or yellow with a green stripe. The green or yellow with a green stripe is a safety ground wire.

I carry a short piece of the tubing that i can connect to the diaphram and blow into the tube to activate the diaphram while making continuity tests.

Definitely make sure the power is off before conducting a continuity test with an ohm meter. It is best to get into the habit of measuring for voltage across any terminals before testing continuity to prevent damaging your meter.

The only component in the machine that can store a charge is a capacitor which is commonly used on the motor wiring, but that would be under the machine near the motor and is not connected to the control panel area.