Message text written by Cliff Hansen
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I'm using a digital ohmmeter to check the coil in my Mazda truck.
Is there any reason that the meter will read high when testing the
primary windings? 1.4 ohm instead of the .9 ohm spec.
If not then I may have found my elusive sluggish, lack-of-power
problem.
Thanks.
Cliff Hansen
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Cliff, try this: Connect the two meter probes together and see what the
meter reads. Does it say .5 ohms? This is typical of cheaper meters.
(actually this is good for a cheaper meter) This is your zero datum point
and you have to subtract this from any reading you take.
Also this value will change over time, over temperature, and over how hard
you push on the probes. Also, if the selector switch starts getting dirty
it can cause erratic readings at these resistance levels.
This is why a cheap DVM is $29.95 and a good Fluke sells for over $300.
Dave
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