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Basically you are reading from one end of the wire, through the
metal frame, and then back to the meter to make the circuit.
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That brings me to the next tip. It's a short one. You must
be touching metal to
get a correct reading, so touching the
outside of your car's paint job will not do it, it must be bare metal.
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Now lets say you are checking 2 wires that run
parallel to each other, but do
not connect anywhere. If you put each
lead on the two wire ends, you should get an open, because the wires are not
connected to each other. If you get any continuity at all between the two,
then that means you have a "shorted" circuit.
Somewhere along the wires, the
metal wire from them is touching together. This can cause circuit breakers
to pop, and if no circuit breaker is installed, it could start fires or
destroy the component it is connected to. If you find a short, immediately
discontinue use and unplug the appliance or component.
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