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interesting.
as an electronic tech for the FAA for 25 yrs and also having done auto electric work i have never seen a current clamp connected to an O scope nor have i ever had the need to do so.
that does not mean it cant be done.
it seems like it could tell you if you have a problem but wont tell you how much life is left in the pump. the brushes could still at the end of their life.
why not use an AC current probe on a low setting much like you would use AC volts on a DC line to check for AC ripple? once again, nver tried this so dont know what you would see.
i would be curious to see what the total current draw is on the one you say is a bad wave form? is it still going to average out to be normal?
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86 930 94kmiles [_ _] RUNNING: [__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
03 BMW 330CI 220K:: [__] RUNNING: [__] NOT RUNNING:
01 suburban 330K:: [__] RUNNING: [__] NOT RUNNING:
RACE CAR:: sold
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