You can test capacitor by using the one blue wire the (two blue wires are both linked together inside) and use a black wire ,the capacitor test in a new module unit tests around 2 micro farad . I hard staring one seem to deteriorate down to 1.5 micro farad or below a cross those two back and blue wires . You have to use a capacitor tested to do this . One think is for sure it will fail with time and use in the end sorry to say .
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